Firstly, the maximum shearing stress envelope line was put forward to replace section line.

首先提出采用最大剪应力包络线来代替剖面线。

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Officials stress every envelope has to be carefully screened.

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The person who initially found the envelope is being treated at a Phoenix-area hospital for a pre-existing condition and stress from the event, and others in the immediate vicinity were examined as well.

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