这些线真的使被子坚固耐用。
我们必须使涡轮机坚固耐用，因为海洋是一个敌对的环境，但所有的迹象都表明我们能做到这一点。
We will have to make the turbines robust because the sea is a hostile environment, but all the signs that we can do it are good.
有的提高了它的耐用性和手感；而有的则使牛仔裤呈现出蓝色。
Some improve its durability and feel; others give jeans their blue color.
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