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1·He is known to have consorted with prostitutes.

众所周知他曾与妓女厮混在一起。《牛津词典》

2·This drug is known to have adverse side effects.

众所周知，这种药具有不良副作用。《牛津词典》

3·Although he is known to only a few, his reputation among them is very great.

尽管只有几个人知道他，但是他在他们之中的名声很大。《柯林斯英汉双解大词典》

4·Earth is the only planet known to support life.

地球是已知的唯一一个支持生命生存的星球。

5·It made hot dogs known to more people.

它让更多的人知道热狗。

6·As is known to us all, some students copy others' homework.

众所周知，有些学生抄别人的作业。

7·The first people known to have settled in England were Celts.

已知的最早在英国定居的民族是凯尔特人。

8·As is known to all, the panda is in danger of becoming extinct.

众所周知，熊猫濒临灭绝。

9·You silly bird, shouted Chulong, These rules are known to everyone.

“你这笨鸟，“楚龙叫道，“这些规矩大家都知道。”

10·Two women are known to have died.

据悉两名妇女死了。《牛津词典》