SSD固态硬盘的TRIM是什么？ 固态硬盘的TRIM能避免SSD在垃圾回收时将无用数据当成有用数据来搬运，从而起到延编程客栈长SSD寿命的作用。在HDD机械硬盘中，已删除文件的逻辑位置会被标记，使得以后存储数据时能够直接在
I am working with a large list of points (each point has three dimensions x,y,z). I am pretty new with R, so I would like to know what is the best way to represent that kind of information.As far as
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