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

Please note: This file is generated if and only if the project is built.

请注意：该文件当且仅当项目构建时生成。

youdao

If you start a path of one color you must continue to use only toe and handholds marked with that color.

VOA: special.2009.12.09

swap I'm going to keep track of a little variable called swap, it's initially true, and as long as it's true, I'm going to keep going, but inside of the loop I'm going to set it to false, and only if I do a swap will I set it to true.

我打算跟踪一个小的变量称为,初始值为真，只要它是真的,算法就会继续，但是在循环里,我打算把他设为假,除非交换发生，就把它设为真。

麻省理工公开课 - 计算机科学及编程导论课程节选

If you're pure, not only are meats and viands pure , but all kinds of knowledge, whether of good and evil.

如果你纯洁，不只是肉和食物，肉和酒会变得纯洁，所有的只是，无论善恶都会变得纯洁。

耶鲁公开课 - 弥尔顿课程节选

Only foot soldiers like Marik risk being sacrificed, and only if they pipe up.

CENTERFORSECURITYPOLICY: CIA��s Debacle Dodged

And only if clients feel better about their own outlook will they remain loyal to you.

FORBES: If Your Clients Are Worried, You Should Be Too

And only if the start-up has reached a further stage of development does it get equity investment.

FORBES: Why Start-ups Matter