爱即是受苦,受苦亦是爱。
Parental investment is the key to understanding sex differences in mating strategies.
交易中最重要的是保持在场。你必须能够度过糟糕的时期才能迎来好的时期。
The best time to plant a tree was 20 years ago; the second-best time is now.
我们衡量成功的标准不仅是产量多少,还有生态系统的改善程度。