Wine glasses that look identical to the naked eye could have radically different fracture strengths, enabling some to withstand much higher levels of volume than others.
在肉眼看来相同的玻璃酒杯，破裂能力可能截然不同，其中一些可能比其他的能够抵抗更高阶的音量。
You can hold a key in bottom position and change the volume simply by exerting different levels of pressure.
你可以在底部的一个关键位置和数量的变化只是施加不同程度的压力。
Objective: To evaluate the variation of the lung volume in acute respiratory distress syndrome (ARDS) dogs when PEEP set at levels of different inflection points on the pressure volume(P-V) curves.
目的：探讨根据压力-容积（P-V）曲线选择不同水平的呼气末正压（PEEP），急性呼吸窘迫综合征（ARDS）犬肺容积的变化情况。
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