就和编织与吸烟同时进行具有挑战性一样，当手里拿着针和钩子的时候，就能减少出于无聊而吃零食和盲目进食的可能。

Just as it's challenging to smoke while knitting, when hands are holding needles and hooks, there's less snacking and mindless eating out of boredom.

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石化还可能同时涉及将死亡的动植物的原有物质与不同成分的矿物质进行交换的作用。

Petrifaction may also involve a simultaneous exchange of the original substance of a dead plant or animal with mineral matter of a different composition.

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更具体地说，它是在宏展开时执行给定的操作，在Scheme系统中宏展开与编译并不总是同时进行的。

More specifically, it will perform the given operation at macro-expansion time, which is not always the same as compile time in Scheme systems.

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Meanwhile, as all this is going on, Hal and Dave, the human astronaut, are talking to each other.

与此同时,一切都在进行中,哈尔和那个叫戴夫的人类宇航员交谈

耶鲁公开课 - 死亡课程节选

Second, a sense of crisis, a radical break in culture, an overturning of conventional artistic forms that goes with a sense that civilization itself is being overturned.

第二，危机感，文化上根本性突破，与文明本身被颠覆同时进行的,颠覆传统艺术模式的运动。

耶鲁公开课 - 1945年后的美国小说课程节选

There's no change in them, and then we also looked at some at non-state functions, work and heat, and saw that those aren't zero going around a cycle. Of course you can do work in a cyclic process, and heat can be exchanged with the environment at the same time.

它们不会有变化，然后我们研究了,一些非态函数，功和热量，并看到,沿着循环行进一周的话,它们并不是零，当然你可以在,一个循环过程中做功，而同时热量可以在系统,与外界环境之间进行交换。

麻省理工公开课 - 热力学与动力学课程节选