One can often handle tension headaches by rubbing and pressing the neck muscles.

人们可以经常通过按摩和按压颈部肌肉来缓解紧张性头痛。

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Why it works: Your body can handle more weight as you're lowering the bar than as you're pressing it up.

练习原理：降低重量有助于你的身体处理更重的重量。

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Handle the Enter key: Instead of having an Add button, watch for users pressing the Enter or Return key by hooking onto the onkeydown event in the textarea.

处理enter键：取消Add按钮，通过检查textarea的onkeydown事件看看用户是否按下了Enter或return键。

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