High-speed aircraft usually employ thin, low-drag, low-lift airfoils; slow aircraft that carry heavy loads use thicker airfoils with high drag and high lift.
高速飞机通常采用低阻力、低升力的流线型薄翼型,载重量大的低速飞机使用高阻力、高升力的厚翼型。
They were fastened with great bars, most of them too high to reach and all too heavy to lift.
门上牢牢地拴着许多大门闩,大多数都高不可及,重不可举。
In hilly areas, water pumping irrigation lift is high, and the irrigation water fee is high because of the high pumping cost, so the burdens on farmers are very heavy.
丘陵地区提水灌溉需要的扬程高,水费占灌溉成本的比重大,农民的负担很重。
The bank was very high and the plank was heavy, and the two soldiers could not manage to lift it, though they were exerting their utmost strength.
可是河堤很高,木头又重,两个兵用尽了力气还是抬不上来。
This paper introduced a heavy load and super-length journey, high stability required lift telescopic cylinder and the principle of its pneumatic (gas drive) control system.
本文给出了负载较大、行程超长、稳定性要求高的举升式伸缩气缸及其气动控制系统的原理及部分关键部位的优化设计方案。
This paper introduced a heavy load and super-length journey, high stability required lift telescopic cylinder and the principle of its pneumatic (gas drive) control system.
本文给出了负载较大、行程超长、稳定性要求高的举升式伸缩气缸及其气动控制系统的原理及部分关键部位的优化设计方案。
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