This cannot easily be avoided unless the index is small enough to be loaded intoRAM.
这个是很难避免的，除非索引足够小，可以加载到内存中。
2
After the data file is copied intoRAM, VMM controls when these pages are overwritten or used to store other data.
在将数据文件复制到RAM中之后，VMM控制何时对这些页面进行覆盖或者将其用于存储其他数据。
3
On distribution roads, where side impacts are likely - when a car might raminto the side of another that is pulling out of a side road, for instance - the limit should be 30mph (50kph).