That water signature is in the form of oxygen isotopes, atoms of oxygen with different Numbers of neutrons.

这个特征就是氧的同位素，它是由氧原子和不同数量的中子组成的。

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That idea got a big boost last week with the discovery that some comets, at least, have the same chemical signature as the water found on Earth.

上周这一理论取得了重大进展，随着科学家发现至少部分彗星和地球上的水相同的化学特性。

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The plants are fed by a central water channel, the signature feature of a Moghul garden.

花园的植物由中央水管道供水，这也是莫卧儿式花园的一个典型特征。

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For example, as part of the process, scientists grow the marine organisms under varying temperatures, and link changes in their shells' chemical signature to different water temperatures.

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The spectrometers can catalog potential life signature gases such as carbon dioxide, methane and water vapor.

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