亲代投资是理解两性交配策略差异的关键。
Parental investment is the key to understanding sex differences in mating strategies.
"The only thing necessary for the triumph of evil is for good men to do nothing."
Our legacy will be defined by how we treat the forests today.
Consciousness is the phenomenon whereby the universe's very existence is made known.
一个设计良好的系统应该易于使用、易于理解和易于修改。