A bag is useful in many ways.

VOA: special.2009.01.25

One useful thing about separating receptors into types or families is that we found that many different receptors work by the same basic underlying mechanism.

我们将受体进行分类的一个依据,就是我们发现,很多受体有相同的作用机制

耶鲁公开课 - 生物医学工程探索课程节选

So I think you will find it useful to use this phrase for expressing yourself in many conversations.

你会发现，在许多对话中，这个句型能恰当地帮你表达自己的意思。

That's all课堂 - SpeakingMax英语口语达人

Here's an example where we'd like to make insulin, or having the insulin gene would be useful, but if we could take the insulin gene and make many copies of the insulin protein that would be a very useful thing.

例子就是我们人工制造胰岛素,胰岛素基因就很有用,但如果我们可以用胰岛素基因,复制很多胰岛素蛋白,这将会是非常有裨益的一件事

耶鲁公开课 - 生物医学工程探索课程节选

How many" is so useful for when you're asking a question about how many numbers there are.

当你想知道具体数量的时候，“How many”非常有用。

How many课堂 - SpeakingMax英语口语达人

You will find this pattern "I'm worried" useful for many situations

你会发现“I'm worried”句型在许多情形下都非常有用。

I'm worried 课堂 - SpeakingMax英语口语达人

Many of these behaviorist techniques have proven to be quite useful.

许多行为主义者所提出的技术,都被证明是非常有效的。

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These signaling proteins play important roles in determining how many cells differentiate down particular pathways and they turn out also to be very useful for treating diseases of those pathways.

这些信号蛋白在决定特定分化路径上,有多少细胞在分化时起着重要作用,且在治疗疾病方面也很有用,同样也是利用这些机制

耶鲁公开课 - 生物医学工程探索课程节选