When the engine is shut off, the intake manifold cools and a slight vacuum forms as a result .
这是因为当发动机熄火时，进气歧管冷却而产生轻微的真空。
One does not inhale the smoke, but if one gets very good at it, one does not even have to puff: the slight vacuum created in the mouth by nose breathing will draw the finest of puffs through the stem.
不需要将烟吸入，但若有人精于此道，都不必再次吸：鼻孔呼吸时在口腔内造成的小小的真空就足以将那缕轻烟吸回烟嘴。
The detection systemcould not press or squeeze the egg like the graders did, but what would happenif they could pull on the egg with a slight negative pressure, or vacuum?
检测系统不能像分级员一样按压或挤压鸡蛋。然而，如果它们能够用极小的负压或真空把鸡蛋牵引起来，结果会怎样呢？
Based on the analysis of vacuum tube slight variation equivalent circuit, a headphone amplifier is designed to drive high fidelity headphone.
以电子管微变等效电路分析为基础，设计了一款以驱动高保真耳机为目的的耳机放大器。
Based on the analysis of vacuum tube slight variation equivalent circuit, a headphone amplifier is designed to drive high fidelity headphone.
以电子管微变等效电路分析为基础，设计了一款以驱动高保真耳机为目的的耳机放大器。
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