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1·The plastic envelope must be kept intact in the course of installation and usage.

在安装使用过程中，不能把塑封套弄破。

2·The officer removes a hard object that turns out to be a plastic envelope containing burglar's tools.

警察从他身上搜出一个硬东西，结果是装了盗窃工具的塑料包。

3·A prepaid plastic recycling envelope is included in the box, making it easy to recycle your newly obsolete phone.

盒子内包含了一个预付的可回收塑料封盖，让其可方便回收你刚废弃的手机。

4·So you just opened an envelope that contained a shiny piece of plastic with your name on it.

所以，你刚打开一个信封，包含有光泽的一块塑料您的姓名。

5·You will receive an envelope with a plastic card and your PIN number enclosed in just a few days.

几天后你就会收到一个信封，内有一张塑料卡和个人密码。

6·In this paper, we propose to measure the beam envelope by a thin plastic scintillation filament.

本文提出用闪烁丝测量束流包络，从而求出粒子流真实发散度的方法。

7·The liquefaction front, originating from the envelope of initial effective stress points, gradually approaches the failure line as the cyclic mobility proceeds as a function of plastic shear work.

液化面作为累积剪切功的函数，从初始应力点的包络线开始，随着循环活动性的进行，逐渐接近破坏线。