气缸中的蒸汽膨胀并推动活塞向外运动.Steam in a cylinder expands to push a piston outward.当排气冲程开始时, 气缸被向上运动着的活塞刮掠.When the exhaust stroke starts, the cylinder is swept out by the upmoving piston.在发动机气缸里发生的动作,可以分为四个过程或冲程.The actions taking ...
[谚]金铸的脚镣, 也没人喜爱.No man loves his fetters, be they made of gold.犯人走路时脚镣叮当作响.The prisoner's ankle chains clanked as they walked.那个罪犯被戴上了脚镣手铐。The criminal was ironed....
The apical membrane of the epithelial cells is apparently essential.上皮细胞的顶膜显然是必要的.Nothing but a great many epithelial cells was observed in the stain.染片中只观察到有大量的上皮细胞.Epithelial tissue occurs most commonly in sheets.上皮组织通...
它绕着质心的椭园运动就几乎看不出来.Its own elliptic motion around it will be almost imperceptible.在无外力时,质心的速度是常量.The velocity of the center of mass is constant in the absence of external forces.错误的根源在于混淆了质心与重心 吗 ?Do We Mistake Center of ...
She went directly to Simon's apartment and knocked on the door.她直奔西蒙的房间，敲了敲门。Simon finished dialing and clamped the phone to his ear.西蒙拨完号，把听筒贴在耳边。Marianne was none too pleased to find Simon seated beside her.玛丽安娜发现...