比如全指向(omnidirectional)就是拾取来自四面八方的声音，不偏不倚。但是很多情况下我们只需要拾取某一点的声音，比如你在台上唱歌，肯定不想把对面观众的声...
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全指向性的角度随着气球尺寸增大而改善，同时也改善了其中频响应。
The degree of omnidirectionality improves with balloon size and for midrange frequencies.
你或许会认为全指向的拾音制式会更适合，这就意味着电容麦会拾到后面和旁边的声音。
You might think an omni pickup pattern would work well, meaning the condenser mics would hear behind as well as the sides.
mirrorlogpath必须指向全限定路径名（即，绝对路径名）。
mirrorlogpath must point to a fully qualified path name, that is, an absolute path name.
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