And, the lagging technology leads to the disadvantages such as poorpressure stability, slow response, high noise, short life and low reliability of piston pumps.
技术上的落后造成了柱塞泵稳定性差、响应慢、噪声大、寿命低和可靠性低等缺点。
2
Even if that can be avoided, poor peasants could come under severe economic pressure to sell.
即便能避免这种情况，贫穷的农民也可能承受要求他们出售的沉重经济压力。
3
As more and more people in formerly poor nations are entering the global middle class, they're beginning to drive cars and eat meat, placing growing pressure on world oil and food supplies.