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某些课程是必修的，其他是选修的。用英语怎么说？

某些课程是必修的，其他是选修的。

Certain courses are compulsory, others are optional.

相关词汇
certain courses are compulsory others optional

certain

adj. 某一，必然的，已确定的；pron. [动词用复数]某些；

courses

n. 课程，路线，前进( course的名词复数 )，进程，课程，方针；

are

vi. （用于第二人称单复数现在时，第一、三人称复数现在时）是；n. 公亩（等于100平方米）；

compulsory

adj. 必须做的，强制性的，义务的，必修的；

others

n. 别的( other的名词复数 )，其他的，（两个中的）另一个，其余的；

optional

adj. 可选择的，随意的，任意的，非强制的，选修科目；
热门例句
He acknowledged publicly that he might have made a mistake.
他当众承认自己可能犯了个错误。
...the spiralling vortex airflow that slows the plane.
使飞机减速的螺旋形气流涡旋
You just go on ahead. I'll come by later...
你只管先往前走。我随后就来。
He who spares his rod hates his son, But he who loves him chastens him early.
24不忍用杖打儿子的,是恨恶他;疼爱儿子的, 趁早管教.
For further information, please contact 414 3925, extension 2253.
详情请致电414 3925,转分机2253。
He sat there while I made the case for his dismissal...
他坐在那儿，听我陈述解雇他的理由。
Baroness Thatcher's claims seem credible to many.
撒切尔女男爵的主张在很多人看来是可信的。
Nothing to be got without pains but poverty.
一份耕耘，一份收获。
This decree obliges unions to delay strikes.
该法令迫使工会推迟罢工。
The right to demand payment from the endorser of a commercial paper when the first party liable fails to pay.
追索权当有支付义务的第一方不能支付时，可以向商业票据的背书人要求支付的权力。
相关例句
We have taken on extra staff to cope with the increased workload.
我们已经额外雇用员工来应付增加了的工作量。
We helped the villager to sink a well.
我们帮助村民挖了一口井.
The bank might think you're worthy of a loan.
银行也许会认为你具备贷款的条件。
The witch charmed the prince.
女巫使王子中了魔法.
They neglect their duty at the least hint of fun elsewhere.
别处哪怕发生一丁点儿乐事，他们便会忘记自己的职责。
He snapped his fingers, and Wilson produced a sheet of paper.
他打了个响指，威尔逊便递过一张纸来。
I had to admire David's vow that he would leave the programme.
戴维发誓要离开这个项目，我不得不对他表示钦佩。
These projects will provide vital links between companies and universities.
这些项目将会成为公司和大学之间至关重要的联系纽带。
Others might say that I am a workaholic.
其他人可能会说我是个工作狂.
While many models vow to go back to college, few do.
很多模特发誓要重回大学校园，但很少有人做到。
Victoria Street, that's the name of the street. There we are, look.
维多利亚大街，那条街就叫这个名字。看，我说的没错吧！
It has 25 calories less than ordinary ice cream.
它所含热量比普通的冰激凌少了25卡路里。
It is France versus Brazil in the final.
决赛是法国队对巴西队。
You can't simply wander around squatting on other people's property.
你不能这样到处乱窜，擅自占用别人的地产。