That is partly because of increasing vibration, but mainly because the spinning rotor blades provide both lift and propulsion.
直升机旋翼既要提供升力又要提供向前的推力是造成这一情况的主要原因，同时旋翼产生的震动也是一个让直升机飞不能高速飞行的部分原因。
Due to its two interacting 242 R2R lift motors, the carer can both lift and position the patient while in the sling during the transfer.
由于它的两个相互作用的242R2R电梯电机，照顾者既可以解除病人和位置而在吊在转移。
Both lift line model and generalized wake model are founded in this paper. A method is given for calculating induced velocities by a wake vortex line which results in a rapid convergence.
建立了旋翼升力线模型和广义尾迹模型，在计算角迹涡线诱导速度时，采用了快速收效方法。
Both a staircase and a lift connect the two floors with an enclosed terrace on the roof.
一道楼梯和一台电梯连接两层楼和封闭的屋顶平台。
Do we need to be so wary both to hitch and to give a lift?
对于搭便车和让别人搭车的情况，我们都需要如此小心吗？
Both work to lift the potential growth rate.
两者都对提升潜在增长率有帮助。
Ross: Lift is amazing, both as a framework and a community, but I struggle with some of its core assumptions.
Ross：无论是作为一个框架，抑或是一个社区，Lift都很令人称赞，但我对它部分的核心假设很纠结。
R2is able to lift, not just hold, this 20-pound weight (about four timesheavier than what other dexterous robots can handle) both near and awayfrom its body.
R2不仅可以拿住东西，还能举起20磅重的东西（约4倍其他灵巧机器人可以做到的重量），擎来擎去都可以。
The scientists' tests showed a cup of tea gives both an immediate and a delayed lift without secondary depressing effects later on.
科学家试验表明一杯茶会立即并且持续的舒缓精神，之后也不会引起不安。
Both were bought primarily with the Champions League in mind and, who knows, if Chelsea lift the trophy in Athens next May then Mourinho might yet have the last laugh.
为了冠军联赛才买来他们两人，他们都知道，如果切尔西明年五月在雅典举起冠军奖杯，穆里尼奥才有可能笑到最后。
Second, Hu urged both sides to lift the level of economic and trade cooperation.
提升经贸合作。
Indeed, it is possible that the effect works both ways, and that rearward segments provide lift to those in front.
事实上，反过来也可能产生这种效果，即后半部分可为前半部分起到提升作用。
Both nations are finalizing a deal to ease entry restrictions and lift a ban in China on promoting travel to the United States.
中美两国正在敲定一项推动赴美旅游的协议，该协议旨在放宽入境限制和解除中国的一项禁令。
Lift your side ribs both forward and upward.
提起两侧的肋骨向前和向上。
Both gantry cranes are an economical and flexible way to lift materials anywhere in your facility.
两种龙门起重机都非常灵活，经济实惠，能够灵活提升工厂中的各种材料。
It is not allowed that both knees are tetanic when fingers touch floor or lift an object during exercising.
在运动中手指触到地板上或举起一个物体的时候，绝不可使双膝僵直。
When both are raised, overall lift fall and drag increases, so the aircraft descends.
当两边的扰流片都扬起时，升力就会下降，阻力增加，飞机下降。
Lift dishes with both of your palms rather than with your fingers, and carry heavy loads in your arms instead of with your hands.
用你的两只手端盘子好过用你的手指头，用你的手臂代替手提重物。
Both pumps offer excellent metering performance, high vacuum lift, dry priming capability and no possibility of back-flow.
两类泵还具有良好的计量、高真空提升、干启动以及防回吸等功能。
Also in the Cabin have both inside and outside lights show the direction of the lift and a few floors.
另外在轿厢内外均要有信号灯显示电梯运行方向及楼层数。
From now on I can no longer lift up his countenance the sky, no longer look down water, only the steps I have both carefully, I don't want a different step in the dirt, in deep footprints!
从此我不再仰脸看青天，不再低头看白水，只谨慎着我双双的脚步，我要一不一不踏在泥土上，打上深深的脚印！
The anomalous lift of the thermoclines was associated closely with the west wind anomaly and intensification of positive wind stress curl on both sides of the equator.
这种温跃层的异常上升是与事件期间此区西风异常的出现和赤道两侧正的风应力旋度增大有着密切关系。
Elevation of wharf apron is different from that of back container yard in mountainous rivers, so, land transportation consists of both level conveyance and lift of containers.
山区河流集装箱码头前沿高程与后方集装箱堆场高程不可能一致，集装箱码头陆域运输不但要完成集装箱的水平输送，而且要完成集装箱在场内的垂直提升。
Come down with an exhalation, without losing the lift of the shoulder blades, with both feet touching the floor at the same time.
呼气下来，不要失去肩胛骨的上提，双脚同时落地。
Use Method: With both hands grip tightly on the horizontal bar, lift the body up and down. It is just for two persons once.
使用方法：双手握杠，曲肘并作上下运动，禁止横向拉动双杠。该器材较适合于中、青年人群，限二人使用。
It produces lift and functions as both a pitch elevator and yaw rudder.
它生产的电梯和功能既是一种俯仰升降舵和方向舵偏转。
Lie on your back and lift both feet together into the air, keeping your knees straight.
后背着地躺下，把双脚并拢伸到空中，保持双膝直立。
So a few weeks ago, Yasmin put in place a plan to lift wages for her employees at both her restaurants to at least $10 an hour by the end of this year.
因此几周前，叶思敏开始实施她的计划，将她两个餐馆员工的工资在今年年底之前都提高到10美元每小时。
So a few weeks ago, Yasmin put in place a plan to lift wages for her employees at both her restaurants to at least $10 an hour by the end of this year.
因此几周前，叶思敏开始实施她的计划，将她两个餐馆员工的工资在今年年底之前都提高到10美元每小时。
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