They draw their energy from sunlight (the reflected light exerts a small pressure on the sail, driving it forward) and therefore need no fuel.

它们利用太阳光获取能量(反射的阳光施加小量压力与太阳帆上，进而驱动其前进)，因而无需燃料。

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Screw pump features are: smooth flow, small pressure fluctuation, imbibition, low noise, high efficiency, long service life and reliable operation.

螺杆泵特点是：流量平稳，压力脉动小，能够自吸，噪声低，效率高，使用寿命长，工作可靠。

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Relief valve or vent valves permit a small pressure to be maintained on the vapor over the oil in the tank (except when the tank is being emptied).

卸压阀或通气阀使罐内油面上方的蒸汽保持微正压(油罐正在排空时除外)。

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Let's say we start from some V1 and p1 here, so high pressure, small volume and we end up with a high volume low pressure, under constant temperature condition.

例如我们要从压强比较高，体积比较小V1，p1出发,到达低压强，大体积的末态，过程中温度不变。

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As long as small business owners can get more work out of existing employees without raising their pay, there will be little pressure for small businesses to hire.

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That kind of offer can put pressure on small and medium-size business owners depending on their business model.

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It's her younger sister, by the way -- not a small point when the pressure to pair becomes palpable.

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