性情温和的斯坦利变了，成了充满信心、笑口常开的英雄。Mild-mannered Stanley morphs into a confident, grinning hero.斯坦利·庇亚斯讲话时唾沫纷飞.Stanley Pierce spits when he talks.斯坦利抹了抹胡子--他的小胡子还是稀稀拉拉的,尽管经常修理, 还是不太整齐.Stanley fingered his mustache, which was stil...
One end of the windpipe is connected with a unidirectional inflating valve.气管的一端与单向充气阀连接.Experiment materials: jar , windpipe, limewater, flume and the experiment record chart for each group.学生用材料: 广口瓶 、 导气管 、 石灰水、火柴、集气瓶...