For any system to be useful and effective, it must also be convenient for you.
对于任何一个高效方便的文件归档系统来说，适合你是最重要的。
For you, everything must be practical and useful in order to merit your attention.
对你来说，一切都必须以务实和有用的，值得你的注意。
The mud manual that you are reading must be very useful.
你读的这本泥浆手册一定很有用。
If you make your own theme, there is no reason these must still be followed, but you may find them useful for determining what certain CSS does.
因此如果你自己做外观主题的话，这些都要遵守，但也会发现这对判别CSS代码的用处也有帮助。
There must be something more useful he could have you doing.
他一定有更为有益的事可以派你们去做。
You have had a long run of amusement, and now you must try to be useful.
你逍遥的时间够长的了，现在应该做点正经事啦。收藏。
Transactions are particularly useful when you have multiple records that must be updated simultaneously.
当您需要同时更新多重资料录时，交易尤其有用。
Transactions are particularly useful when you have multiple records that must be updated simultaneously.
当您需要同时更新多重资料录时，交易尤其有用。
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