插: 动词1.(把细长或薄的东西放进、挤入、刺进或穿入; 插上; 插进) stick in; insert 短语和例子把插头插上 insert the plug in a socket; plug in; 把门插上 bolt the door; 把双手插在口袋里 put one's hands in one's pockets; 山峰高插入云 peaks penetrating
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
