（1）by the way
1.順便提一下
By the way, do you have any idea where the post office is?
順便問一下,你知道郵局在哪兒嗎?
2.在途中

（2）He has no idea (how to express complex emotions).
這句是同位語從句！括號內的從句都是修飾前面的idea。
如：I have no idea【 what I should do. /where they have gone./how he did that./why i must do this】.

（3）attempt to do和attempt doing 漢語意思相近，但是用法不一，
1、attempt to do是表示具體的嘗試做什么，是很具體的一次性行為；
2、attempt doing是指比較一貫性的，長期以來的。
I can see his attempt to woo her.我能看出來他想追她。
Don't attempt doing it by yourself.不要企圖一個人做這件事。

attempt to 努力做某事，不一定成功，相當于try to do
manage to 經過努力成功地做成某事，相當于succeed in doing

（4）diagnosis:
名詞 n.
1.診斷;診斷結果;診斷書[C][U][(+of)]
The two doctors made different diagnoses of my disease.
兩位醫生對我的病下了不同的診斷結論。
2.調查分析,判斷;判斷結論[C][U][(+of)]
The committees undertook a comprehensive diagnosis of the city's problems.
該委員會負責對這個城市的問題作全面調查分析。
3.【生】特征簡介

（5）backfire:
名詞 n.1.(引擎的)逆火

不及物動詞 vi.

1.放出逆火
2.產生和預期情況完全相反的結果;事與愿違
His scheme to win the girl backfired and she went to another guy.
他追求那女孩的計劃產生了反效果,現在她名花另有主。
3.失敗