lest

conj.

1. 免得；以免
   in order to prevent sth from happening
   1. He gripped his brother's arm lest he be trampled by the mob.
      他紧抓着他兄弟的胳膊，怕他让暴民踩着。
2. （引出产生某种情感的原因）唯恐，担心
   used to introduce the reason for the particular emotion mentioned
   1. She was afraid lest she had revealed too much.
      她担心她泄露得太多了。

1. CONJ-SUBORD 唯恐；免得
   If you do something lest something unpleasant should happen, you do it to try to prevent the unpleasant thing from happening.
   1. I was afraid to open the door lest he should follow me...
      我不敢开门，唯恐他还跟着我。
   2. The president has gone along with the hardliners lest they be tempted to oust him...
      总统同意了强硬派的意见，以免他们产生赶他下台的念头。
   3. And, lest we forget, Einstein wrote his most influential papers while working as a clerk.
      大家不要忘记，爱因斯坦最有影响力的论文还是当文员的时候写的。

1. I was afraid to open the door lest he should follow me
   我不敢开门，唯恐他还跟着我。
2. The president has gone along with the hardliners lest they be tempted to oust him
   总统同意了强硬派的意见，以免他们产生赶他下台的念头。
3. And, lest we forget, Einstein wrote his most influential papers while working as a clerk.
   大家不要忘记，爱因斯坦最有影响力的论文还是当文员的时候写的。
4. While they have not got their aims, their anxiety is how to get them; when they have got them, their anxiety is lest they should lose them.
   其未得之也，患得之；既得之，患失之。
5. They spoke in whispers lest they should be heard.
   他们低声耳语惟恐被人听见。
6. Read in a good light lest it should hurt your eyes.
   到明处来看书，免得搞坏了视力。
7. Close the window quickly lest the raindrops ( should) slant in.
   快关窗户，别让雨点潲进来。
8. Do not overexert when reaming holes or threading, lest breaking off the reamer or the tap.
   铰孔或攻丝时，不要用力过猛，以免折断铰刀或丝锥。
9. I reminded him several times lest he should forget.
   我几次提醒他，唯恐他忘了。
10. She went into the bedroom softly so as not to wake her child ( or lest she should wake her child).
    她轻轻地走进卧室，生怕惊醒了孩子。
11. He wrote a letter home lest his parents worry.
    他写了封信回家，免得父母结记。
12. He is not concerned lest his people should be poor, but only lest what they have should be ill-proportioned.
    不患寡而患不均。（《论语》）
13. I am afraid of you, lest I have bestowed upon you labour in vain.
    我为你们害怕。惟恐我在你们身上是枉费了工夫。
14. I used notes lest faulty memory should lead me astray.
    我翻阅了所做的笔记，免得记错了而使我误入歧途。
15. I fear lest I lose you when I am sleeping.
    只恐我在睡中把你丢失了。
16. Lest I should confuse you with the crowd, you stand aside.
    只恐我把你和大家混在一起，你独自站在一边。
17. Lest I should know you too easily, you play with me.
    只恐我太容易地认得你，你对我耍花招。
18. We gave them bread, lest they should starve.
    我们给他们面包，以免他们饿死。
19. I trembled lest he should send me to call her;
    我直发抖，唯恐他差我去叫她。
20. I have slain a man among them, and I fear lest they slay me.
    我确已杀过他们中的一个人，所以我怕他们杀我。
21. Lest we forget how fragile we are.
    以免我们忘记我们是多么脆弱。
22. I hesitated to speak lest I disturB our tranquility.
    我迟迟不说话，惟恐搅乱了我们的宁静。
23. He gave me some money lest I was short of it.
    他给了些钱以免我缺钱。
24. Lest I forget them never venture to leave me alone.
    他们从不敢冒险离开我，唯恐我将其忘记。
25. He took his umbrella lest it should rain.
    他带了雨伞以免下雨。
26. I fear lest we commit an inexcusable blunder.
    我为我们会犯不可原谅的错误而担忧。
27. I got up early lest I ( should) miss the train.
    我早起以免错过了火车。
28. I shall ring you up lest you should forget to come.
    我会打电话给你，以免你忘了来。
29. Beware your hat, lest it should be blown away.
    当心你的帽子别被吹走了！
30. Lest you think the film is too violent, I must assure you that it is not.
    以免你认为该影片暴力性太强，我必须消除你的疑虑。