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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
He defaulted in the wrestling tournament.
他在摔跤比赛中弃权了.
By 2020, Voyager 2 will probably fall silent, its generators too feeble to power communications.
到了2020年, “旅行者2号”可能沉寂下来, 因为它的供电装置将虚弱到不能为通讯系统提供足够电力.
In the year 296,036 , Voyager 2 will pass within 4.3 lightyears of Sirius.
在296036年, “旅行者2号”将在4.3光年的距离范围内通过天狼星.
How odd life was, how unfathomable, how profoundly unjust.
生活多么离奇，多么莫测，多么不公啊！
I was invited to the club through the good offices of my father - in - law .
在 岳父 的介绍下,我加入了俱乐部.
The odour of vitamin in skin is repugnant to insects.
昆虫很讨厌皮肤内维生素的气味。
The old official club website address has been taken over by cybersquatters.
俱乐部原来的官方网址已经被人抢注了。
The wombat and kangaroo are both marsupials in Australia.
袋熊、袋鼠都是澳大利亚的有袋类动物.
Nocturnal creatures, the northern hairy - nosed wombat is rarely seen by humans.
北毛鼻袋熊是夜行性动物, 人类很少能看到它们.
He was woozy from a blow on the head.
他被当头一击,打得晕头转向.
Black walnut is extremely sensitive to damage from late spring frosts.
黑胡桃对春天晚霜的危害非常敏感.
Her naked body was found wrapped in a sheet in a field.
在田里发现了她的尸体，全身赤裸，裹在一条床单里。
Will you oblige me with your name and address?
敬请赐告你的姓名和地址好 吗 ?
This wanderlust is growing among students, too.
这种“出国欲”也正在学生当中滋长.