1. Walls have ears.

    小心隔墙有耳。

    2. Turn over a new leaf.

    洗心革面，改过自新。

    3. Two dogs strive for a bone, and a third runs away with it.

    鹬蚌相争，渔翁得利。

    4. Two heads are better than one.

    一个好汉三个帮。

    5. Two of a trade seldom agree.

    同行是冤家。

    6. Two wrongs do not make a right.

    别人错了，不等于你对了。

    7. Unity is strength.

    团结就是力量。

    8. Unpleasant advice is a good medicine.

    忠言逆耳利于行。

    9. Until all is over one's ambition never dies.

    不到黄河心不死。

    10. Venture a small fish to catch a great one.

    吃小亏占大便宜。

    11. Touch pitch, and you will be defiled.

    常在河边走，哪有不湿鞋。

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