1. Even militarily weak and small nations have defied U. N. decisions with impunity.
    即使是军事力量薄弱的小国，也可平安无事地反抗联合国的决定。

2. Thus the rods, by falling, and by the direction in which they fell, recorded for the slumbering scientist the strength of a shock that was too weak to waken him, and the direction from which it came.
    由于地震太弱而未惊醒科学家时，木棒倒下的多少和倒下的方向就为科学家记录下了地震的强度和地震方向。

3. The medicine he had been given because of the pain from his heart attack made his eyes weak and he only dimly saw the young man in Marine Corps uniform standing outside the oxygen tent.
    老人所服用的医治心脏病的药物损害了他的视力。所以他只能模模糊糊看见一个年轻人，身穿海军陆战队军服，站在氧气帐外。

4. Useless, powerless, complaining, sick, weak, conservative, rigid, helpless, unproductive, wrinkled, ugly, unattractive, and on and on.
    无用，无能，爱抱怨，多病，体弱，保守，僵化，无助，成不了事，满脸皱纹，丑陋不堪，魅力无存，等等，等等。

5. His mathematics are weak.
    他数学不好.

6. He cannot run because he has a weak heart.
    他有心脏病, 不能跑.

7. ´Mr.Harmsworth,´ I said in a weak voice.
    "哈姆斯沃斯先生，"我无力地说。

8. She was still weak after her illness.
    她病后仍很虚弱.

9. She is too weak for conversation, so without asking, I go about providing for her needs.
    她虚弱得没法交谈，因此没等她要求，我就开始做她所需要的。

10. I was born weak.I usually have stomachaches and backaches.
    我天生虚弱,我常常会胃痛和背痛.