These factors make it impossible to implement even a simple readline method without polling.
这些因素使得没有轮询就不可能实现甚至是简单的readline方法。
These are the features that are often difficult or impossible to implement using markup languages such as HTML or even DHTML.
这些特性通常很难或者根本不可能使用标记语言如HTML甚至是DHTML来实现。
These are the features that are often difficult or impossible to implement using markup languages such as HTML or even DHTML.
这些特性通常很难或者根本不可能使用标记语言如HTML甚至是DHTML来实现。
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