restriction相关的词根或词缀是: strainstrictstring

复数： restrictions

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Enticing research also comes from studies of caloric restriction .

诱人的研究也来自热量限制的研究。

Secret ballot enables the voters to express their free will on the candidates without any restriction .

秘密投票使得全民可以不受任何约束，自由表达自己的选举意志。

This is the biggest restriction I found .

我发现这是最大的限制条款。

That restriction was lifted six months ago .

这一限制于6个月前解除。

There 's not even an age restriction .

甚至连年龄限制都还没有。