礼貌: courtesy, manners...
推敲: to think over...
延伸: to extend, to spread...
后盾: support, backing...
家乡: hometown, native place...
折射: to show the nature of)...
开机: to start an engine, to boot up (a computer), to press Ctrl-Alt-Delete, to begin shooting a film or TV show...
天空: sky...
绿: green, (slang) (derived from ) to cheat on (one's spouse or boyfriend or girlfriend)...
锻炼: to toughen, to temper, to engage in physical exercise, to work out, to develop one's skills, to train oneself...
