And the other optional component here is the introduction.

其他的可组成部分是引子。

At my university, there is no division between compulsory and optional modules.

在我的大学里，没有必课课的划分。

And let's see, the optional extra is the Tower of London.

让我看看，这个团可额外择参观伦敦塔。

Oh, and the optional extra is a visit to the S.S.Great Britain. -OK...

可额外择参观大不列颠号。-好吧。

Last year the Supreme Court made the Medicaid expansion optional.

去年最高法院宣布此次医疗普及政策并非强制执行。

In the word " almond" the L is optional.

在“almond”这个词中，L 可以发音，也可以不发。

Some courses in college are required while others are optional.

大学里有些课程是必的，有些是的。

Optional features include blue-ray drives, intel's WiDi technology and backlit keyboards.

可择的配置包括蓝光驱动，因特尔widi无线技术背光键盘。

Almost as if art isn't optional for humans.

几乎好像艺术并不是人类的择。

Which is just says chopped and it's optional and doesn't tell you how much.

只写着剁碎，可，也没告诉你切多少。

I was advised to just take the test optional option for my more selective colleges.

有人建议我只参加那些重点大学的可考试。

They're a bit shocked that in China this is compulsory rather than optional, erm...

他们听到这在中国是必而不是有点震惊。

In intransitive verb patterns, adverbs or prepositional phrases are often referred to as " optional."

在不及物动词句型中，副词或介词短语通常是 “可有可无的”。

The ice caps are melting, Leonard. In the future, swimming isn't going to be optional.

冰盖在融化呀兰纳德。未来游泳是不可避免的。

With earache, toothache and stomachache and backache, it's optional.

对于耳痛，牙痛，胃痛背痛，加不加冠词是可择的。

Names are a special feature of conversation in part because they're almost always optional.

名字是对话中的特殊元素，部分原因在于，它们几乎总是可有可无的。

Is that optional course as hard as everybody says?

那门课像大家都说的那么难吗？

Attending their classes should be optional for university students.

对大学生来说，去课应该是可以择的。

152. The optional helicopter is adopted to help the optimistic helpless in the hell.

可用的直升飞机被用来帮助狱里那些乐观的无助者。

What are the compulsory courses and optional courses for this major?

请问，这个专业的必课课都有哪些？