合作探索、活动延伸、深化；

The cooperation investigate, activity extension, deep turn;

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虽然在北纬88°以北其较为罕见，但有证据表明，它们的活动范围甚至一直延伸到北极，向南则延伸到加拿大的詹姆斯湾。

While they are rare north of 88°, there is evidence that they range all the way across the Arctic, and as far south as James Bay in Canada.

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该测试可能延伸到基本的产品安装、单元测试、简单的配置，或正式的 FVT 或 SVT 活动。

This testing may range from basic installation of the product, unit testing, simple configuration, or formal FVT or SVT activities.

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