而且因为它们之间不存在交互——或者说没有星体上的物质在它们间流动——这就为我们提供了一处独特的星体实验室，在这个实验室里我们可以寻找广义相对论引发的效果并且探测极端重力。
And because there is no interaction-or star matter streaming between them-we may have a unique stellar laboratory here to look for effects of general relativity and probe for extreme gravity.
旋启式止回阀压降最小，能够完全自动关闭，即在介质流动停止、重力和介质倒流的状态下自动关闭阀门。
Swing-type check off er the least pressure drop and offer simple automatic closure; when fluid flow stops gravity and flow reversal closes valve.
在重力式油水分离场中，剪切流场主要存在于各种聚结填料中和器壁的流动边界层内。
In the gravity type oil water separating field, the shearing field mainly exists in all kinds of collison packing and flow boundary of vessel.
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