無回聲室 的英文怎麼說
中文拼音 [wúhuíshēngshì]
無回聲室
英文
anechoic chamber-
Precision methods for the determination of sound power levels of noise sources in anechoic and hemi - anechoic rooms
在無回聲和半無回聲的室內精確測定噪聲源聲功率級的方法Smiling unnaturally and muttering to himself, he sat on the sofa in a pose expressive of utter hopelessness, or got up, approached the door, and peeped through the crack into the reception - room, where his visitors were awaiting him, then turned back with a gesture of despair and took up a book
他不自然地傻笑，小聲嘟囔著什麼，時而無奈地在沙發上坐下，時而起身走向門口，透過門縫往接待室里瞧瞧，時而又揮揮手踱回來抓起一本書看。
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