yield,return,profit怎么区分？

这三个词的意思是完全不一样的.
Yield就是出产或让于/投降/放弃的意思,return是回归/回/归还的意思,而profit是利润/利益的意思.
yield

vt.
1. 出产;结出(果实);产生(效果,收益等)
These apple trees yield plenty of fruit this year.
这些苹果树今年结了许多苹果。
2. 让于,给于;同意
3. 被迫放弃
He was forced to yield the castle.
他被迫放弃城堡。
4. 使屈服,使投降
He didn't yield himself to his rival.
他没有向对手屈服。
vi.
1. 出产[Q]
These fruit trees yielded poorly last year.
去年这些果树产量很低。
2. 服从;屈服;投降[(+to)]
We will never yield to invaders.
我们绝不会向侵略者屈服。
3. 屈曲;倒塌;垮掉[(+to)]
4. 让路
n.
1. 产量;收获量;收益,利润[C][U]
The current yield on municipal bonds is 10%.
当前市政债券的利润是百分之十。

return

vi.
1. 回,返回,归[(+to/from)]
She did not return home till eleven o'clock.
她十一点钟才回家。
2. 重新发生;回复,恢复[(+to)]
The situation has returned to normal in the capital.
首都的局势已恢复正常。
3. 归还,退回[(+to)]
4. 回答;反驳
vt.
1. 还,归还;送回[(+to)][O1]
Have you