燃烧: (物质剧烈氧化而发光、发热; 烧) burn; kindle; flame; set on fire; [化学] combustion; inflammation; ignition 短语和例子怒火燃烧 burning with rage; 革命的烈火在燃烧。 the flames of revolution are raging. 干柴容易燃烧。 dry wood bur
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
