A primary log, whether empty or full, requires the same amount of disk space.

无论主日志是空的还是满的，所需的磁盘空间量都是相同的。

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A little extra work would also allow tables containing full struct definitions; a little more would ensure that space isn't wasted at the front of the array with useless empty entries.

我们还要实现另外一些任务：让这个表包含完整的结构定义；还要确保这个数组前面没有空项，这样就不会浪费空间。

youdao

Space appears (to be) empty, but it is full of unseen dangers for the men who venture from the earth.

宇宙似乎是空荡荡的，但却充满了看不见的东西，这些东西对于从地球出去探险的人来说是很危险的。

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