The property of the hybrid active silencer relies on the equivalent impedance at the secondary sound source position and the impedance distribution characteristics of the one-chamber pipe itself.

研究结果表明，复合有源消声器的消声效果取决于次级扬声器位置的等效声阻抗以及无源式消声管道本身的阻抗分布特性。

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She went into a lonely forbidden chamber where no one was allowed to come, and poisoned a beautiful apple.

她走进一间禁止任何人进入的孤寂的房间，在一个美丽的苹果里下了毒。

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To train a rat, the experimenter placed it in an operant conditioning chamber: a small plastic box with a lever at one end.

为了训练小鼠，实验人员把它放在一个操作性条件反射室：一个一端置有操作杆的塑料箱。

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He hears a noise at the window. Here is the beginning of the poem: Once upon a midnight dreary, while I pondered,weak and weary,Over many a quaint and curious volume of forgotten lore -- While I nodded,nearly napping, suddenly there came a tapping, As of some one gently rapping -- rapping at my chamber door.

VOA: special.2010.10.31

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