1.make up 占據(jù)
This made up 15% of their total income.
這是他們總收入的百分之十五。
2.by chance 偶然;意外地
Talked to a stranger you meet by chance in the wood.
對一個你在樹林中偶然遇到的陌生人說話。
3.bubble up 冒泡;噴涌
The warm gases bubbled up through the water.
暖氣從水里噗噗地冒了出來。
4.be lethal to 對...是致命的
It sounds simple, but killing all of these blood-producing marrow cells would be lethal to humans.
這想法聽起來挺容易,但是如果殺死所有的造血骨髓細(xì)胞,這對于人體來說是致命的。