be of use

基本解释

But he believes that theory, to be of use, must keep its feet on the ground.
但他相信，具有实用价值的理论必须要能与实际的生活情况相结合。
County attorney : Yes , but I would like to see what you take , Mrs Peters ,and keep an eye out for anything that might be of use to us .
县法官：是的。但我想要看看你拿的东西，彼得斯夫人，请睁大眼睛注意可能对我们有用的任何东西。
"It is a general principle of psychology, " observed the grandfather of the discipline, William James, "that consciousness deserts all processes where it can no longer be of use."
“这是心理学的一个普遍原则”，根据心理学科创始人威廉·詹姆斯的观察，“意识会丢弃所有不再有用的过程”。

He ordered them to destroy everything that might be of use to the enemy.
They like to--when they're computing the investment yield, they want to be completely honest and not use any rules of thumb.
当他们计算投资收益率的时候,他们需要完全精确,而非用经验公式
耶鲁公开课 - 金融市场课程节选
We could use the name of a genre, and I'll be talking a lot about genre in this course.
我们可以用某种音乐风格描述它,本课程中,我将会谈到很多音乐风格
耶鲁公开课 - 聆听音乐课程节选

Her cancer, she says, has spread so widely, touching her brain and liver that Avastin would no longer be of use to her.
FORBES: Britain's Cancer Calculus