1·Diamonds are the hardest known mineral.
钻石是已知的最坚硬的矿石。
—— 《牛津词典》
2·Exposure to lead is known to damage the brains of young children.
已知接触铅会损害幼童的大脑。
—— 《柯林斯英汉双解大词典》
3·His estimate of half a million HIV-positive cases was based on an extrapolation of the known incidence of the virus.
他的50万HIV阳性病例的估计是基于对已知病毒发病率的推断。
—— 《柯林斯英汉双解大词典》
4·It is difficult to relate these results with any known cause.
这些结果很难与任何已知的原因联系在一起。
—— 《新英汉大辞典》
5·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。
1·You sly old devil! How long have you known?
你这个老滑头！你知道有多久了？
—— 《牛津词典》
2·They must have known what their father was up to.
他们一定已经知道他们的父亲在暗地里做什么。
—— 《柯林斯英汉双解大词典》
3·He had never known him to be so chatty and cordial.
他以前从来不知道他是这样一个健谈而友善的人。
—— 《柯林斯英汉双解大词典》
4·I have known what it is like to go without food for days.
我已知道数日不吃东西是什么滋味了。
—— 《柯林斯英汉双解大词典》
5·"You've known," she said sharply, "and you didn't tell me?"
“你已经知道了，”她严厉地说道，“而你却没有告诉我？”
—— 《柯林斯英汉双解大词典》