有用的英文

　　She has ten years' useful experience behind her.

　　她有十年的经验，能派上用场。

　　The article served as a useful starting point for our discussion.

　　这篇文章成了我们展开讨论的良好起点。

　　This technique is useful but it has its limitations.

　　这种技术实用，但也有局限性。

　　It was a collaboration that produced extremely useful results.

　　这是一次带来极其有益的成果的合作。

　　Some products can be recycled at the end of their useful life.

　　有些产品过了有效使用年限后是可以回收再利用的。