The people pay attention on raising the span of the usage of the thread of drill collars and preventing the accident of drill string thread failure.

预防钻柱螺纹失效事故发生和提高螺纹连接使用寿命的技术长期以来倍受关注。

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One thread could see the STR reference refer to a String object in which the constructor has not run.

一个线程能看见str引用一个String对象，在该对象中构造函数尚未运行。

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There are eight fundamental types (of values) in Lua: nil, Boolean, number, string, function, thread, table, and userdata.

Lua中的基本类型(值)有8种：nil，布尔型，数字，字符串，函数，线程，表以及用户数据。

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