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

在我的大学里，没有必修课和选修课的划分。

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

让我看看，这个团可额外选择参观伦敦塔。

And the other optional component here is the introduction.

其他的可选组成部分是引子。

Make sure you stay in touch so they know your choices for the optional modules. You don't want to miss out doing your preferred specialisms.

一定要注意保持联系，这样他们才能知道要选择哪些选修课。不会希望到时候错过想要的专业方向的。

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”这个单词，L 可以发音，也可以不发。

But with virtually unlimited optional extras, upgrades, and customizations, the true cost of a bespoke Rolls-Royce has no limits.

通过无限制的附加选择，升级，和客户定制，一辆定制的劳斯莱斯价格上不封顶。

No, there's an optional module on seed structure and function in the third year that I might do, so I thought it might be useful for that.

不，第三年有一门关于种子结构和功能选修课，我可能会选这门课，所以我觉得它可能会有用。

Some courses in college are required while others are optional.

大学里有些课程是必修的，有些是选修的。

Level design is of the wide linear variety, usually with a clear main path that leads from checkpoint to checkpoint, but plenty of opportunities to venture off that path to discover optional goodies.

关卡设计采用了宽线性风格，通常有一条清晰的主线路径贯穿各检查点，但也留有充足的空间离主线探索。

He called this program Zero Hour P.E. , and it started as an optional morning program before becoming integrated into the school's normal schedule.

他把这个项目称为“零小时体育”(Zero Hour P.E.)，它一开始是一个选修的晨间项目，后来被纳入了学校的常规课程表。

Almost as if art isn't optional for humans.

几乎好像艺术并不是人类的选择。

Um, then there's a London trip on the 16th of February and we'll be taking a medium-sized coach so there'll be 45 places on that and let's see the optional extra is the Tower of London.

2月16日有一个伦敦之旅，我们将乘坐型客车，所以那上面有45个座位，让我们看看可选的额外座位是伦敦塔。

Student 1: Well, I guess that must be optional, because I don't see it on the requirements list. Okay, we should start planning our class presentation since that counts for half the grade.

（学生甲）我觉得那一定是非强制性的，因为我在作业要求里没有看见过这一项。我们应该开始准备课堂演讲了，毕竟这个占了总分的一半呢。

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选考试。

It keeps them extra moist and adds a bright citrus flavor, but it's totally optional.

能让蛋糕保持额外的湿润，并增添一种明亮的柑橘风味，但一步完全是可选的。

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

他们听到这在国是必修而不是选修有点震惊。

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

在不及物动词句型，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，胃痛和背痛，加不加冠词是可选择的。