Its own elliptic motion around it will be almost imperceptible.它绕着质心的椭园运动就几乎看不出来.His head moved in an almost imperceptible nod.他点头的动作微小得几乎看不出来。She answered with an almost imperceptible nod of the head.她几乎不为人察觉地点了一下头作为回答。...
You can always fall back on him when you are in difficulties.你碰到困难时总是可以求助于他.Doctors sometimes fall back on old cures.有时医生们求助于老的疗法.When necessary, instinct is the most reliable resource you can fall back on.必要时，最保险的办法就是凭直...
They tinkered with the engine…他们修了修发动机。The Chemists have tinkered with heat and metal catalysts to refine their materials.化学家摆弄热和金属催化剂来提炼.They tinkered with the engine.他们修了修发动机。They have tinkered with the geometry of the...
Airbags protect the driver in the event of a severe frontal impact.汽车若遇到正面猛烈撞击，安全气囊可以保护驾车者。The doors can be manually operated in the event of fire.发生火灾时,这些门可以手动控制.In the event ( that ) our team wins, there will be a cele...