Trying to understand someone's motive for doing something is a helpful skill to have.
理解某人做某件事的意图是一个有用的技能…This information is called session state and is an important ingredient of a useful application.
这个信息叫做会话状态，是有用的应用程序的重要部分。It may be useful to start with ROTs that have been used or developed outside your particular environment.
一开始的时候，使用那些在您特定环境以外被使用过或者被开发出来的ROT，这种做法可能有用。Could be useful, he said to Harry and Hermione as they went into dinner. Shall we go?
总会有用的。他对哈利和赫敏说，这时他们正朝着礼堂走去。我们去吗？This may be particularly useful in athletes with a worrying ECG, and yet a "normal" echocardiogram .
这可能对于那些心电图结果令人担忧而超声心动图结果“正常”的运动员特别有用。Having lived through it, I can now say this to you with a bit more certainty than when death was a useful but purely intellectual concept.
经过这次重生，比起以前死亡是个有用当纯粹是认知上的概念，我现在有更确切的体会；Chinese scholar quoted by a Beijing newspaper said the experience could be useful for solving some of the country's other border disputes.
一家北京报纸援引一个中国学者的话说，这为解决中国同其它国家的边界争端提供了有用的经验。One of the most useful techniques comes from a practical application of the old right tool for the right job rule known as embedding.
最有用的技术之一来自选择合适的工具做合适的事情这一古老规则的实际应用，采用嵌入技术。It is often helpful to print out the instructions so you can check off the installation steps as you complete them.
印出指示说明通常有用，这样你在完成了安装步骤之后，你可以核对一下安装步骤。