Black polyester paint; optional in other special paints on request.

Automatic thread trimmer ( optional ), to increase sewing efficiency and reducing production cost.

备有自动 切线 机型, 可增加缝制效率降低成本.

The other excursions are optional.

其他的短途旅行是自选项目。

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。

three optional courses

三门选修课

It is optional with you.

那是你的自由.

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。

The goods are optional, but only one.

这些物品是可以任选的, 但只能选一个.

A variable automatic transmission , Mitsubishi's first , will be optional.

同时也有一款无极变速器作为可选配置.

This model comes with a number of optional extras (= things you can choose to have but which you will have to pay extra for) .

这一型号有一系列可供选择的附件，价格另计。

There are a range of optional units available depending upon work role and work setting.

有一系列的可选单元可根据工作的职责和工作设置而定.

So far, the optional course has a history of 200 years.

选修课从产生到现在已经经历了近200年的历史.

Anyone who fails an elective optional course will be fined 50 Yuan.

选修课不及格者将被处以五十元罚款.

Cultural quality course is a compound optional course that contains moral education and art education.

文化素养课是一门德育和美育相结合的“复合型”的选修课.

Advanced numerical control technology is an optional course of graduate student of mechanical engineering specialty.

现代数控技术是机械工程专业研究生教学的学科专业选修课.

W : Is that optional course as hard as everybody says?

那门选修课象别人说的那么难 吗 ?

Is that optional course as hard as everybody says?

那个选修课真的就像每个人说的那样难 吗 ?

In Mauritius, English and French are compulsory courses. Many take an Oriental language an optional course.

在毛里求斯, 英、法文是必修课, 此外还有相当多的学生选修一门东方语言.

The Optional Course Fees must be paid by monthly.

业余学校的费用按月支付.

This course is a specialized optional course for overseas undergraduates who major in Chinese.

本课程是为汉语言专业本科的外国留学生开设的一门专业选修课.

This course is a fundamental optional course of animal science specialty.

本课程是动物科学专业的学科基础选修课.