Leave a gap at the top and bottom so air can circulate.

在顶部和底部各留一点空隙，这样空气就可以流通了。

《柯林斯英汉双解大词典》

All this is so elementary that one would blush to state it if it were not being constantly forgotten by those who coin and circulate the new slogans.

所有这一切都是如此初级，以至于如果不是那些杜撰和传播新口号的人一再忘记它，人们都羞于陈述。

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Mercury has no atmosphere to speak of, so there's no way for heat to circulate from the hot regions into the craters.

值得一提的是水星没有大气层，所以没有可以从高热量区向陨石流通的热能。

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Hemoglobin, as you know, is an oxygen carrier and so red blood cells concentrate in bags of hemoglobin which circulate in your blood and they carry oxygen.

众所周知,血红蛋白可以携带氧气,含有大量血红蛋白的红细胞,在全身循环,以携带氧气

耶鲁公开课 - 生物医学工程探索课程节选

Then that insulin would accumulate in the muscle, enter the blood, and circulate all over the body and so you'd turn the muscle into an insulin making tissue.

胰岛素会在肌肉组织中累积,并进入血液,使其在全身循环,如此就使肌肉成了能产生胰岛素的组织

耶鲁公开课 - 生物医学工程探索课程节选

Every so often a local temple would circulate a flier inviting people to come hear another talk from a survivor.

WSJ: Euro 2012: It's OK to Root for Germany

The bulk of the case is cast from a single piece of aluminum, and those fins, which have enough room between them for air to circulate, dissipate heat so that a noisy fan isn't required.

WSJ: A Hard Drive With Quiet Style | Geek Chic

And rumors continue to circulate about Goldman Sachs, which so far is the least scathed of all the Wall Street firms.

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