乐极生悲
After joy comes sadness.
说曹操到曹操就到
Talk of the devil and the devil comes.
团结就是力量
Union is strength.
需要为发明之母
Necessity is the mother of invention.
满招损，谦受益
Haughtiness invites ruin; humility receives benefits.
恶有恶报
He that does evil shall find evil.
恶事传千里
Bad news travels quickly.
熟能生巧
Practice makes perfect.
缓兵之计
a fabian policy
缘木求鱼
to get water from a flint
词汇解析：
haughtiness：傲慢, 不逊 【例句】She called him on his haughtiness.她责备他傲慢无礼。
Fabian：adj. 费边式的, 拖延时间的 n. 费边主义 【常用短语】①Fabian tactics：慎重待机的策略; 缓进军略 ②Fabian Society：ph. 费边协会, 费边社(1884年在伦敦由英国资产阶级知识分子组成的一个政治组织, 主张采取温和缓进的办法改造社会), n. 费边社