導讀：詞組能有效的幫助大家提高完型和句子的理解與寫作質量，為保證大家能夠靈活運用考研重點詞組，社科賽斯李梅老師特配以相應的例句，幫助大家更快地獲得更高的分數。
631. on second thoughts 經重新考慮
On second thoughts he changed his mind.
進一步考慮后，他改變了主意。
632. out of danger 脫離危險
The patient is out of danger.
病人脫離危險了。
633. on the basis of 根據，在...的基礎上
Statement should be made on the basis of fact.
說話要有根據。
634. on the contrary 正相反
On the contrary, I have tons of things to do.
正相反，我有一大堆事要做。
635. on the grounds of 根據，以...為由
We refused to publish the report on the grounds of cost.
因費用的關系，我們拒絕公布這份報告。
636. on the other hand 另一方面
On the other hand, the idea appealed to him.
從另一方面來說，這個想法又使他很感興趣。
637. on the whole 總的來說，大體上
On the whole he is right.
大體上他是對的。
On the whole, the situation is not entirely gloomy.
總的來看，形勢并非一團糟。
638. on/upon the point of 即將...之時，正要...的時候
He was on the point of saying something when the phone rang.
他正要說話時電話鈴響了。
639. once for all 一勞永逸地，永遠地
I will explain it once for all.
我會徹底解釋清楚。
640.once in a while 偶爾
Once in a while she phoned him.
她偶爾會給他打個電話。
