Eye of newt goes into the little black bag, if and only if there is reproducible scientific evidence that it works.

当且仅当有可重复的科学证据证明蝾螈之眼有效时，蝾螈之眼才会进入小黑袋中。

youdao

This is true as the above derivation for a and b of opposite parity is an if and only if statement.

这是正确的，因为上面对 a 和 b 的奇偶性的推导是一个当且仅当命题。

youdao

Eye of newt goes into the little black bag, if and only if there isreproducible scientific evidence that it works.

把蝾螈眼放入黑色的小袋子，当且仅当有重复性的科学证据表明它的实用性）。

youdao

And once he said: "Four-fifths of our troubles in this life would disappear if we would only sit down and keep still."

VOA: special.2010.12.23

and they should only make investments if there's really a--if they can see a really compelling case.

他们应在只有在,非常好的机会出现的时候,才进行投资。

耶鲁公开课 - 金融市场课程节选

The only rider on that being, if they're producing Coca-Cola and you have any kind of concern for your teeth, maybe you shouldn't produce so much anyway.

如果可口可乐是唯一的生产者,并且你狠关心牙齿健康的话,或许你就不应该生产这么多产品了

耶鲁公开课 - 博弈论课程节选

And if only -- if only -- we should have done this outside.

WHITEHOUSE: Press Briefing

What if the high-tech stuff makes for a great car--only if and when it works?

FORBES: Magazine Article

Mr. Jonsson believes he can hook people -- his age and younger -- if they only try the stuff.

WSJ: Supersize Me: Whale Meat Resurfaces on Iceland Menus