Strong yarns require considerable twist. However, beyond an optimum point additional twist will cause yarns to kink and finally to lose strength.

高强度的纱线要求有相当大的捻度，但是超过最佳捻度后，附加的捻度会使纱线扭结，最终降低纱线的强力。

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"This is a terrible woman," thought Polly. "She's strong enough to break my arm with one twist."

“这是一个可怕的女人，”波莉想，“她太有劲了，稍稍一打就会把我的手臂弄断。”

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The Liberal Democrats were the first party to run general-election campaigns with a strong local twist, but now the other parties are doing it too.

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He has to be strong enough to plant a foot and then twist his body.

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