最好适当地使用引用，收尾器与之不同，除了清理本地资源，它在编写得很好的应用程序中基本没用。
Unlike references, which are best used in moderation, finalizers have essentially no use in a well-written application, with the exception of tidying up native resources.
没有人的指令，电脑基本上没用，所以这正是心理学在计算机科学中重要的原因。
A computer isn't much use without a human instructing it, and this is where the psychology is important.
基本的行人安全知识在科技面前都没用，风险太可怕了。
Elemental pedestrian safety knowledge is compromised by technology, and the risks are scary.
没有人的指令，电脑基本上没用，所以这正是心理学在计算机科学中重要的原因。
A computer isn "t much use without a human instructing it, and this is where the psychology is important."
这意味着当一驾直升机严重损坏的时候，你将无法控制它，它基本就没用了。
What this means is that when helicopters become heavily damaged, they become unresponsive and generally useless.
这意味着当一驾直升机严重损坏的时候，你将无法控制它，它基本就没用了。
What this means is that when helicopters become heavily damaged, they become unresponsive and generally useless.
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