1,是be based on
2.on earth究竟
on the earth在地球上
3 我們要看回原句是怎樣,實(shí)際用哪個(gè)介詞,例如
This is the house in which he was born
This is the weapon with which he used to attack the guy
4.take up 拿起,開始從事的意思
Shall we take up the business now
現(xiàn)在我們來談?wù)勆?好嗎?
go in for 參加,從事；追求；贊成
What kind of recreation do you go in for ?
你在文娛方面有什么愛好?
devote 致力于,通常詞組為devote oneself to sth

5.break down分解；發(fā)生故障；失??；毀掉；制服
break out 爆發(fā) ,突發(fā)
break into 闖入,破門而入