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 ...
What is immediately striking is how resourceful the children are.最令人注目的是孩子们的机智聪明.He is very clever and endlessly resourceful.他聪明机敏、足智多谋.He really is resourceful.他还真有办法....