例句與造句

1. During the compression period, the exhaust is pumped out.
2. During this compression period, fluids can be pumped, or compressed ( if they are gaseous fluids ).
3. However, as one and the same valve usually controls both steam flows, a short cutoff at admission adversely affects the exhaust and compression periods which should ideally always be kept fairly constant; if the exhaust event is too brief, the totality of the exhaust steam cannot evacuate the cylinder, choking it and giving excessive compression ( " " kick back " " ).
4. It's difficult to find compression period in a sentence. 用compression period造句挺難的