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Attendance at these lectures is not compulsory.是什么意思？

Attendance at these lectures is not compulsory.

这些课不是硬性规定要听的。

相关词汇
attendance at these lectures is not compulsory

attendance

n. 出席，参加，出席率，出席者，出席人数；

at

prep. （表示位置）在，在（某时间或时刻），以，达， 向，朝；n. 阿特（老挝辅币单位，100 阿特 = 1 基普）；

these

adj. 这些的；pron. 这些；

lectures

n. 演讲，讲课( lecture的名词复数 )，冗长的训斥[谴责]；v. （向…）演讲， （给…）讲课( lecture的第三人称单数 )，责备，教训，（尤指恼人地）指责；

is

vt.& vi. 是（be的三单形式；n. 存在；

not

adv. 不，[用以表示否定、否认、拒绝、禁止等]不是，几乎不，未必，没有[用于否定后面的词或短语]；

compulsory

adj. 必须做的，强制性的，义务的，必修的；
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