There are also simple and safe ways to test the retina's functioning.

测试视网膜功能的方法简单而且安全。

youdao

And academics are using sophisticated techniques to test whether popular medicines are safe.

学者们正使用精密的技术检测大众化的药物是否安全。

youdao

Test in on a small area of the leather first, though, just to be on the safe side.

如果想安全起见，在一小块皮革上先试验下。

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The Administration also proposes to allow States to test strategies to overcome financial deterrents to forming safe and stable two-parent households and marriage in federal programs.

WHITEHOUSE: The White House

So far Mr. Romney's play-it-safe strategy has worked, but the next four months will be a harder test.

WSJ: Romney Plays It Safe

It is contained within the case of the rocket, into which is pumped a liquid oxidiser called high-test peroxide (HTP), a concentrated form of hydrogen peroxide which is relatively safe to handle.

ECONOMIST: The land-speed record