I am cought between the devil and the deep blue sea. 进退维谷。

I am not a slave, I am not a captive, and by energy I can overcome the greater obstacles. 我不是奴隶，也不是俘虏，我有力量可以克服更大的艰难险阻。

I am not now that which I have been. (I am not what I used to be.) 今日之我已非昔日之我。

I am not only witty in myself, but the cause that wit is in other men. 我不仅要使自己有才智，而且也要使别人有才智。

I believe the first test of truly great man is his humility. 一个真正伟大的人，对他的第一个考验就是看他是否谦逊。

I cannot be your friend and your flatterer too. 我不能既是你的朋友，而又对你阿谀奉承。

I count myself in nothing else so happy as in a soul remem-bering my good friends. 我认为，只有在脑海中想起好朋友时我才会那样快乐。

Ideals are like the stars -- we never reach them, but like mariners, we chart our course by them. 理想好像星星，不能摘到，但我们犹如水手，可借它指引航向。

Idle folks have most labour. 懒汉总嫌活太多。

Idle folks lack no excuses. 懒汉辩解，何患无词。

Idleness is the key of beggary, and the root of all evil. 懒惰是行乞的敲门砖，是万恶的根源。

Idleness is the root (or mother) of all evil (or sin or vice). 懒惰是万恶之源。

Idleness is the rust of the mind. 懒惰使脑子生锈。

Idleness rusts the mind. 懒惰使人的头脑迟钝。

Idle young, needy old. 少壮不努力，老大徒伤悲。四级成绩查询忘记准考证号

If a donkey bray at you, don''t bray at him. 傻瓜惹著你，你别跟他缠。

If a man empties his purse into his head, no man can take it away from him. 如果倒空钱袋，装入脑袋，那就无人能够把钱夺走。

If a man will begin with certainties, he shall end in doubts, but if he will be content to begin with doubts, he shall end in certaintics. 如果以肯定开始，必将以怀疑告终;如果愿以怀疑开始，必将以肯定告终。

If at first you don''t succeed, try, try again. 初试不成功，努力勿懈怠。