单词：block out
block out的用法和样例：
例句
- For instance, he recalls meeting with the town mayor to ask permission to block off streets for a student fundraiser.举例来说，他记得有一次必须会见该市市长请求封闭街道来进行学生募款运动。
- As the filler works in sealed condition and pollution comes out, it is up to Fooestuff Sanitatation Law.由于是在全封闭状态下的，所以可以消除污染及有害物的扩散，符合食品卫生法的要求。
词汇搭配
- block out封闭
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