数学不是观赏性运动，你必须参与其中才能理解。
Mathematics is not a spectator sport; you have to play to understand.
我不试图把握市场时机。我只是试图买入被低估的股票。
Collaboration across borders is essential to combat illegal fishing and preserve marine ecosystems.
Laughing is good for you if you don't kill yourself.
无法摆脱自己的自由。