出气口 air drain; air gate; air outlet; air-out; escape hole; escape port; gas off-take; gas outlet; gas port; pop off; riser vent 吹气口 puff port; thrust port .
The animals were tested for how well they remembered spatial features in their environment for locating a preferred escapehole to exit a well-lit maze and hide.
这些动物通过逃离迷宫钻进树洞隐藏起来从而被测试对环境的空间记忆力。
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Astronomers and scientists think that a black hole is a region of space (not a thing) into which matter has fallen and from which nothing can escape - not even light. So we can't see a black hole.