高二英语：经典实用的英文成语谚语(十一)思维导图

Obedience is the first duty of a soldier. 军人以服从命令为天职。

Observation is the best teacher. 观察是最好的老师。

Offense is the best defense. 进攻是最好的防御。

Old friends and old wines are best. 陈酒味醇，老友情深。

Old sin makes new shame. 一失足成千古恨。

Once a man and twice a child. 一次老，两次小。

Once a thief, always a thief. 偷盗一次，做贼一世。

Once and for all. 一劳永逸。

Once bitten, twice shy. 一朝被蛇咬, 十年怕井绳。

Once in a blue moon. 千载一时。

Once in a while; Once too often; Once in a blue moon 有时候;常常;很少

One boy is a boy, two boys half a boy, three boys no boy. 一个和尚挑水喝，两个和尚抬水喝，三个和尚没水喝。

One can not learn a language well unless one works hard. 学好一种语言非下苦功不可。

One cannot be in two places at once. 【谚】我分不开身啊(不帮忙的托辞)。

One cannot learn a language well merely by learning its grammatical rules. 光学文法规则是学不好语言的。

One cannot live by oneself. 人不能单独生活。

One cannot put back the clock. 时钟不能倒转。

One comes up against examples like these: 我们会遭遇到像这样的例子： (高三上1)

One eyewitness is better than ten hearsays. 百闻不如一见。

One false move may lose the game. 一著不慎，满盘皆输。

One good turn deserves another. 好心有好报;投桃报李。行善积德。

One hour today is worth two tomorrow. 争分夺秒效率高。

One man's fault is other man's lesson. 前车之鉴。

One never loses anything by politeness. 讲礼貌不吃亏。