呼吸: 1.(生物体同外界进行气体交换) breathe; respire 短语和例子出去呼吸新鲜空气 go out for a breath of fresh air; 用鼻孔[嘴] 呼吸 breathe through the nostrils [mouth]; 我又能像个自由人一样呼吸了。 once again i breathed as a free man.2.breat
垂直: perpendicular; vertical; squareness; verticality; perpendicularity 短语和例子两线垂直相交。the two lines meet at right angles. 设 ab 垂直于 cd。let ab be perpendicular to cd. 当表面与射线垂直时，射线的强度最大。when a surfa
