在这个网站上您可以找到有关OR映射、OODB等方面的链接，而且还有很多针对持续性分层的好思想以及对为什么分层有用的解释。
You'll find links for or mapping, OODBs, and so on, and also many good ideas for layering your persistence and why that makes sense.
因此如果考虑可靠性的价值，确定性不仅仅没有用处，而且事实上还有害处。
Therefore certainty is not only something of no use, but is in fact damaging, if we value reliability.
TRaX中还有一些其它有用的功能，但是它们不象此处所示的功能那样常用，而且，本文也没有足够篇幅将它们全部列出。
A number of other items in TRaX are important, but they are not as commonly used as those shown here, and there isn't room here to list them all.
采砂船上不仅有挖斗，而且还有冲砂和分选设备，以使较重的有用矿粒因重力而沉积。
The dredges not only have scoops but also devices for washing sand or gravel and screening it so that gravity settles the heavier and more valuable particles.
采砂船上不仅有挖斗，而且还有冲砂和分选设备，以使较重的有用矿粒因重力而沉积。
The dredges not only have scoops but also devices for washing sand or gravel and screening it so that gravity settles the heavier and more valuable particles.
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