一些人动作平稳流畅，其他人则跌跌撞撞，大概是喝醉了。Some people moved in silky, liquid movements, others were jerky, probably drunk.尽量放松，保持平稳呼吸。Relax as much as possible and keep breathing steadily.直升机在恢复平稳之前倾斜得很厉害。The helicopter turned at an awf...
It intercepts a portion of the light impinging on the photocell.它遮住一部分照射在光电管上的光.Sight is made possible by rays of light impinging on the retina.由于光线射到视网膜上,眼睛才看得见.A wavefront at high radio frequencies or optical frequenci...