形容词 elective voluntary

形容词 compulsory

1. /u0064/u0061/u006E/u0063/u0069/u002E/u0039/u0031/u0031/u0063/u0068/u0061/u002E/u0063/u006F/u006D

1. It is optional with you.
    那是你的自由。

2. Attendance at the lecture is optional.
    这一讲座可随意参加。

3. Is English an optional lesson, or does everyone have to learn it?
    英语是选修课还是每个人必修的课程？

1. /u0064/u0061/u006E/u0063/u0069/u002E/u0039/u0031/u0031/u0063/u0068/u0061/u002E/u0063/u006F/u006D

1. 可选项：1) 个人用户证书基本项 可选项(Optional) 扩展项(Extend) 版本号 发证机构ID号 扩展序号序号 用户身份证ID 密钥用法签名算法 黑名单库分布点发证机构 政策URL 有效期限(包括签发日期和作废日期) 业务受理点ID 姓名 用户地址公

1. Our ContactForm consists of three fields: a topic, which is a choice among three options; a message, which is a character field; and a sender, which is an email field and is optional (because even anonymous feedback can be useful).
    我们的 ContactForm 包含三个字段：一个topic，它是一个三选一的选择框；一个message，它是一个文本域；还有一个sender，它是一个可选的email域（因为即使是匿名反馈也是有用的）。

2. Electronic foamer is a optional cleaning device used witha multifunctional burnisher.
    电子打泡箱是一种配合多功能刷机使用的可选式清洁机械。

3. optional的反义词

3. Many ability of spiders, ghosts stone statue streets surging, and macrophages Optional people, the situation difficult to control.
    不少能力强的蜘蛛、石像鬼满街涌动，择人而噬，局面难以控制。

4. In addition, the invention further relates to a catalyzer combination used for polymerizing a conjugated dialkene monomer and the anions of an optional mono-vinyl aromatic hydrocarbon into a polydiene polymer having high and medium vinyl content. The catalyzer combination comprises an organolithium compound used as an anionic polymerization initiator, at least an alkali metal alkoxide compound expressed by the formula as a structure regulator.
    此外，本发明还涉及一种用于将共轭二烯烃单体和任选的单乙烯基芳烃阴离子聚合成具有中高乙烯基含量的聚二烯聚合物的催化剂组合物，其包含作为阴离子聚合引发剂的有机锂化合物，和作为结构调节剂的至少一种式所示的碱金属醇盐化合物。

5. optional什么意思

5. The new Renault Megane Estate will be available by the end of June, with a wide range of standard and optional equipment.
    新雷诺梅甘娜恏将可在6月底之前，以全各种标准和可选的设备。

6. In addition to completing all required courses and receiving the minimum credits for graduation of the major, students may take a minor and the course of minor is the same as the optional course under the semester credit limit of STUT regulation.
    学生所修辅系学分应在主系规定最低毕业学分数以外加修，其辅系课程视为学生之选修科目，受学则学期限修学分数之限制。

7. optional的近义词

7. But it`s optional, and you can safely uninstall the sponsor part of Messenger Plus!
    但它的可选的，您可以放心地卸载赞助的一部分，即时通讯，另加！

8. In accordance with the volume and value of the selected Kv valve DN, but also optional with the pipe diameter.
    根据流量和阀门Kv值选定公称通径，也可选同管道内径。

9. The special feature of article is the possibility of optional use paired with the pock sensor display quantum 3d Farsight.
    特殊功能的文章是有可能选择使用配对的麻子量子传感器显示三维

10. optional在线翻译

10. Optional Food: rice, indica rice, corn, wheat, soybeans, peas and other grain legumes; chives, parsley, garlic, radish, lily and other vegetables; mutton, dog meat, beef, chicken and eel, carp, silver carp, octopus, shrimp and other meat; oranges, coconut, pineapple, litchi, longan and other fruits.
    可选的食物：大米，水稻，玉米，小麦，大豆，豌豆和其它豆类，韭菜，芹菜，大蒜，百合等蔬菜萝卜，羊肉，狗肉，牛肉，鸡肉，鳗鱼，鲤鱼，鲢鱼，章鱼，虾和其他肉类，柑橘，椰子，菠萝，荔枝，龙眼等水果。

11. optional的意思

11. The button can be animated with a slide-in effect, an optional background sound and linked to an URL.
      按钮可以带有向内滑动特效的动画，一个可选择的背景音乐以及一个 URL 地址的链接。

12. Furthermore, because of the reduction of the output of one type symbol, the arithmetic coding becomes optional.
      此外，由于减少了一种符号输出，使得算术编码过程可选。

13. It comes packaged with basic badging software and offers optional magnetic stripe encoding.
      与打印机打包同时供货的还有基本的徽章软件和任意磁条内码。

14. Two other vehicle, the Honda Fit with standard side air bags and the Toyota Yaris equipped with optional side air bags, also got good ratings in front and side tests.
      另外两款车，配备了标准气囊的本田和配备了可选择囊的Toyota Yaris也在前面的测试中取得了好成绩。

15. optional什么意思

15. AZONA today the style with Ji Yan melting and luxuriant interpret, small coat, medium the sleeve short unlined upper garment, pants that reach knee, short skirt, clipping is distinct, lightsome and optional; Refined Wen Wan's delicate cotton cloth, frivolous snow spinning is euphemistic Yi couple, cloth of metallic gauze blending reachs knitted piece goods of silk floss blending, the simple sense of overhang and flow is full of be puzzled of mysterious fawn on; The colour of numerous beautiful romance, profusion is flowery, what golden pink fastens is tie-in, take you to experience dream and memory.
      AZONA今季演译甜美华丽的风格，小外套、中袖短衫、及膝裤、短裙、剪裁层次分明，轻盈随意；雅致温婉精致的棉布、轻薄的雪纺纱委婉迤俪，金属纱混纺布及丝绵混纺针织面料，悬垂与流动的质感布满神秘媚惑；繁花浪漫的色彩，缤纷绚丽，金粉色系的搭配，带你体验梦幻和回忆。

16. This is an optional attribute that is used to define the registration information for a node.
      这是一个可选属性，用来定义一个节点的注册信息。

17. The text attribute is optional, but if you want to display something descriptive in place of the url you can use it.
      该文本属性是可选的，但是如果你想显示的URL可以使用它进行一些描述。

18. This is an optional attribute.
      这是个可选属性。

19. However, the alt attribute is optional and may be omitted from particular image elements.
      然而，alt的属性是可选的，甚至是可以忽略的。

20. The required attribute is optional, by default it is false. It indicates whether this field is required.
      必须属性是额外的，预设是不用，意思是这字段是否必须。

1. 可选择的；非强制的
    If something is optional, you can choose whether or not you do it or have it.

    e.g. A holiday isn't an optional extra. In this stressful, frantic world it's a must...
           休假并非可有可无。在这个紧张而忙碌的世界，它是必不可少的。
    e.g. Sex education is a sensitive area for some parents, and thus it should remain optional.
           性教育对某些家长而言是个敏感领域，因此应该保持其非强制性。

1. possible but not necessary
    left to personal choice