The five has so many simultaneous effects that they are not very useful in artificially controlling the growth of crops.

这五种东西同时具有许多效应，因此它们在人为控制作物生长方面不是很有用。

youdao

Life is very stressful nowadays, so it is useful for us to talk about how to cope with stress.

现在的生活压力很大，所以谈谈如何应对压力对我们很有用。

youdao

About 80 percent of the fusion energy released is in the form of those neutrons, so the reaction isn't very healthy (or useful) for a starship.

大约80百分之的聚变能以中子的形式释放出来，所以这个核反应不是很大（或有用）对于一个星际飞船。

youdao

And so what this gave us was a very, very useful general criterion for determining whether something happened spontaneously.

这个告诉我们的是一个,非常非常一般的判据,他能帮助我们判断一个过程是否自发进行。

麻省理工公开课 - 热力学与动力学课程节选

So again, these "Can" questions are very useful. You can use them in really any situation.

因此，“Can” 问句确实非常有用。你可以在任何语境中用到它们。

Can 课堂 - SpeakingMax英语口语达人

And we've only just begun using it, but it has just a bunch GetInt GetString GetDouble of very useful functions like GetInt, GetString, GetDouble, And so as those names imply, you can just cull these functions with no arguments and you'll get back that data type based on its name.

我们刚开始使用了它，里面有很多的,有用的函数，像，所以，那些名字暗示，你可以挑选这些,没有参数的函数，然后你可以通过它的名字,获取他们的数据类型。

哈佛公开课 - 计算机科学课程节选

Around that time at the end of the ice age, people started gathering cereal grains for the first time, and they noticed that if you kept these grains, you could protect yourself against food shortages, so that was very useful.

NPR: Looking at the World Through Beer Glasses

And so we feel it was a very useful and productive meeting.

WHITEHOUSE: Press Briefing

Which means the very durability that makes plastic so useful to humans also makes it incredibly harmful to all the natural life cycles in every ecosystem worldwide.

CNN: Opinion: Creating a sea of change