A pencil is a good tool. You can use a pencil to make annotations in the margins of your text without doing any permanent damage to the text.
铅笔是一个好的工具。你可以用铅笔在文章边缘做注释，就不会对文本造成任何不可复原的毁坏。
If I cut the front essay, the opposite one is bound to suffer damage, leaving out half of it or keeping the text without the subject.
假如你剪了这面的文章，那面的文章势必会被损坏，只留下一半或缺少文章题目。
The text analyzes the damage types of aluminum reduction cell, and proposes the methods to check out and repair the aluminum electrolytic plots.
本文分析了铝电解槽的破损形式，提出了铝电解槽破损的检查与修补方法。
The text introduce familiar disease and prevent measure of asphalt pavement such as high temperature distortion, split and water damage.
介绍了沥青路面常见病害，高温变形、开裂和水害的产生原因及防治措施。
The text introduce familiar disease and prevent measure of asphalt pavement such as high temperature distortion, split and water damage.
介绍了沥青路面常见病害，高温变形、开裂和水害的产生原因及防治措施。
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