According to ancient Chinese astronomy, the ziwei star was surrounded by 28 other stars, meaning it was the heart of the sky.

根据中国古代天文学，紫微星被其它28个星星环绕，这意味着它是天空的中心。

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The samara is a monocopter, meaning it has a single wing.

翅果是一个单翼飞行器，意味着它只有单独的一个翅膀。

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The spray forms a water-resistant layer, meaning it can be cleaned using only water.

喷雾能形成防水层，也就是说，只需用水就能洗净它。

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By the eighteenth century, a greenhorn had the meaning it has today - a person who is new in a job.

VOA: special.2010.05.23

That's a very large number, it's all relative, so you don't necessarily know it's large without me telling you or giving you other ions to compare to, but chlorine does have a very large affinity, meaning it's really likes getting an electron and becoming a chlorine ion.

这是个非常大的数值，这种数值都是相对的，因此你不一定能知道这是非常大的,除非我告诉你或给你另外离子数值作为参考，但是氯确实有很高的电子亲和能，这意味着它非常乐意得到一个电子,而变成一个氯离子。

麻省理工公开课 - 化学原理课程节选

The one that does is called the sense strand and the other one is called the anti-sense strand, anti meaning it's the compliment and it will hybridize to the sense.

能够进行编码的一条链叫做正义链,另一条则叫做反义链,反义的意思是它与正义链互补,并能够与之杂交

耶鲁公开课 - 生物医学工程探索课程节选

Box 1 represents a neutral return, meaning it is the benchmark for the other three boxes.

FORBES: Investment Principle Matters to Principal

An Ofsted report said that the service was "adequate", meaning it reached minimum standards.

BBC: Torbay child protection service 'improves'

The UK shrank in the last two quarters, meaning it is back in recession.

BBC: UK companies remain optimistic, surveys suggest