值得注意的是如果网格空间减少一半(意味着网格函数增加)，计算机运行的时间则需要翻几番。
It should be noted that typically the computer time required increases several-fold when the grid spacing is halved.
其他任何空间函数都不能使用网格索引。
None of the other spatial functions can exploit a grid index.
调查之后，您发现树型网格总是保留expando函数的状态。
After investigating, you find that the tree grid would always hold the states of expando functions.
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