The planet has a relatively thin atmosphere composed mostly of nitrogen and oxygen.

这颗行星有相对较薄的大气层，主要由氮气和氧气组成。

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The problem is that much of that refreezing creates a relatively thin layer of so-called first-year ice.

问题是，重新冻结的冰很大程度上相对较薄，所以被称为“首年冰”。

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In the early days copper was normally followed by a relatively thin bright nickel layer with conventional chromium topcoat.

早期，涂覆铜层之后，再涂一薄层光亮镍，然后传统的铬层位于最外层。

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In the early days copper was normally followed by a relatively thin bright nickel layer with conventional chromium topcoat.

早期，涂覆铜层之后，再涂一薄层光亮镍，然后传统的铬层位于最外层。

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