In 1941, the train would have been pulled by a steam engine.1941年，火车本可以由蒸汽机车拉动。Who invented the steam engine?谁发明了蒸汽机？Who invented the steam engine?谁发明了蒸汽机?...
There are several gates providing ingress to the meadow in this picture.在这张画上有几个进入草地的篱笆门。ingress pipe导入管A high seating position makes ingress and egress easy.较高的座椅位置使入口和出口容易.ingress of dust尘埃入侵a means of ingress进入的方法The ...