刚强纯洁的高尚人品,要在烈火般艰苦的斗争中锤炼;惊天动地的丰功伟业,必须在薄冰般险恶的环境里前进。
The more you learn, the better you'll perform in the market.
Laughter and tears are both responses to frustration and exhaustion. I myself prefer to laugh, since there is less cleaning up to do afterward.