如果你的鞣制过程经不起纪录片团队的检验，是时候重新思考你的方法了。
If your tanning process wouldn't withstand a documentary film crew, it's time to rethink your methods.
The journey of solving a mathematical problem is as important as the solution itself, for it teaches us patience, persistence, and the joy of discovery.
孔子说：“人无信誉，不知能干什么？就象大车没有车轴，小车没有车轴，怎么能启动？”
世界是一个黑暗的地方，但其中也有光明。你只需要去寻找。
跨国合作是保护海洋生态系统的关键。