Love me,love my dog 爱屋及乌 No pain no gain 不经一事，不长一智 Seeing is believing 眼见为实 Practice makes perfect 百炼成钢 Time flies 光阴似箭 The walls have ears！ 隔墙有耳 Monkey see ，monkey do 东施效颦 You asked for it！自作自受 Think twice before you do it 三思而后行笨鸟先飞the slow need to start early 必由之路the only way 闭关自守close the country to international intercourse 变本加厉be further intensified 变化无常chop and change fantasticality 别开生面having sth. New 别有用心have ulterior motives 彬彬有礼refined and courteous urbane 兵不厌诈in war nothing is too deceitful 博古通今erudite and informed 不败之地incincible position 不耻下问feel not ashamed to learn from one's subordinates 不可救药be past praying for beyond redemption 不劳而获reap where one has not sown 不屈不挠fortitude indefatigability perseverance persevere tenacity 不速之客crasher uninvited guest
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