Most shape memory alloys can only "cycle" (or change form) a limited number of times before the material gives out.

大部分形状记忆合金只能“循环”(或称改变形态)有限次数，之后材料就会疲劳了。

youdao

The goal is to stop the cycle of easing rules on banks in good times and tightening them only after a crisis.

VOA: special.2010.09.17

It would be great if the word (economic) cycle only existed in a singular form, and the only cycle we had in the economy was happy expansion.

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But there are kids all over the country who learned about Bionicles only at the end of the cycle or were only halfway through their mania when the line was discontinued.

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But in Bihar, the councils have been through only one electoral cycle.

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