At least in temperate zones, maximum diversity is often found in mid-successional stages, not in the climax community.

至少在温带地区，最大的多样性通常出现在演替中期，而不是在顶极群落中。

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These trees only grow in temperate zones.

这些树只能生长在温带。

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It is 5 times more common in temperate zones than in the tropics.

这是5倍，更常见的在温带地区比在热带地区。

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"There's no known source of caffeine in temperate zones, so there's nothing we can suggest as a sort of alternative hypothesis at this point except for a human source, " she said.

CNN: Researchers find caffeine in waters off Oregon

Writing about his work earlier this year in Virology Journal, Rice shows how chickenpox is much less common in parts of the world with high levels of UV rays compared with places where the levels are low, and why in temperate zones, the disease peaks in winter and spring, when UV rays are at their lowest.

FORBES: Sun's UV Rays May Prevent Chickenpox