If we can mechanize farming we can produce more crops with fewer people.如果我们能使耕种机械化,我们就能用较少的人力生产更多的农产品.The technology condition of gears direct effects on motion of the mechanize system.齿轮的技术状态的好坏直接影响整台设备或整套机械化系统可靠运行....
She stamped out the letters'sOS'in the snow.她用脚在雪地踩出'sOS'这三个字母.The ferry did not even have time to send out an SOS.渡船甚至连发出紧急呼救信号的时间都没有。to send an SOS发出紧急呼救信号So they were asked to draw their SOS famili...