When threatened they'll run in a zigzag pattern, an effective mode of escape.

受到威胁时，它们会以 Z 字形跑，这是一种有效的逃跑方式。

This process is called convection, and it's an efficient way of transferring heat.

这个过程叫做对流，这是一种有效的传热方式。

Economic condition was only a stimulus for the trend toward efficient living.

经济情况当时只是有效居住的一个因素。

Well, I think it's safe to say our friendship is effectively ruined.

我想我们的友谊 很有效的被终结了。

What works for some people doesn't work for others.

对某些人有效的方法并不适用于另一些人。

And three years ago, the flu vaccine was only 19 percent effective.

三年之前，苗的有效率只有19%。

[D] art is effective in facilitating scientific innovations.

艺术在促进科学创新方面是有效的。

But the council has found no effective way to enforce compliance.

但是该委员会至今没有发现有效的方法。

This is an incredibly potent synthetic drug.

这是一种非常有效的合成药物。

We don't know how to take effective action.

我们不知道该如何采取有效的行动。

Some worry that one day sooner than later a plethora of jobs could be taken away, from real humans and given to robots and computers that could presumably do the work faster, cheaper, et cetera.

有人担心，迟早有一天，大量的工作岗位会从真人手中被夺走，交给机器人和电脑，它们的优点有效率更好、价格低廉，等等。

And a strategy that was really effective for us was paid user acquisition.

一个非常有效的策略是“付费用户获取”。

There are no proven treatments for COVID-19.

目前还没有针对COVID-19的有效疗法。

This observation hints that effective embryonic learning could signal neurological strengths of children to parents.

这一观察提示，有效的胎教可以向父母传达儿童神经系统的力量。

Second, it was difficult to produce penicillin in the ample quantities needed to be effective.

第二，产有效的足量青霉素很困难。

The tried-and-true, well-crafted formulas and vocabulary of architecture do not apply here.

那些建筑学里精心设计， 行之有效的公式术语 在这里通通不适用。

How long is the quotation valid for?

报价的有效期是多久？

Jean Liu: You know, in a very difficult road situation there'straffic control, you know, there's one-way situation, you know, the closest car may not be the most efficient one.

当路况复杂的时候就会有交通管制，就会出现单行道的情况，在那种情况下，最近的车可能就不是最有效率的了。

You know, I like the way you have efficiently folded this tab under. See in a tape emergency you could shave valuable seconds off your time.

莫妮卡，我很欣赏你有效率的把胶带的一端折起来。你看，急需用胶带的时候，可省下好几秒宝贵的时间。

A student passport is valid in accordance with the length of their programmes.

学护照的有效期与他们的学时一致。