Giving photons orbital angular momentum means twisting a beam 's wavefront so that , as the beam travels forward , its wavefront rotates around the propagation axis .
给予光子轨道角动量意味着扭转光束的波前,使得光束在向前传播时,其波前会绕着传播轴旋转。
Mr. kalmadi and his team allegedly received kickbacks for twisting bidding criteria in a way that eliminated other eligible bidders and awarded the contract for time-keeping equipment to a switzerland-based company called swiss timing ltd. , according to the cbi .
Thanks to a plastic film that produces varying amounts of electricity when forced into different positions , this remote control allows you to change channels and raise and lower volume simply by twisting and flexing it in different directions .
Sudden stops and twisting motions can cause the meniscus to rip or experience a more gradual tear .
跑动中骤停、做扭转动作等均可能导致半月板撕裂或慢性的裂伤。
That could be due to arterial structural abnormalities , or from stress put on the arteries caused by a sudden twisting movement .
这可能归因于动脉结构异样,或者突然的扭转运动对动脉造成的压迫。
Others point to powerful commercial concerns ( such as oil companies ) , who have a vested interest in twisting debate , and attacking science they dislike .