Sex is two option buttons, male or female.

Once you've paid your option premium, no one can come and ask you for more money.

一旦你付了期权手续费, 没人会要求你再付.

If the option premium were too low to compensate the writer for the risk.

如果期权费过低不足以补偿出票方的风险.

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

黑色聚脂漆; 按订货要求可选用其它专门的油漆.

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.