"Men and women differ in their desires for short-term mating because the reproductive benefits and costs differed for our ancestors."

"I'm a perfectionist, I admit it. I'm always trying to improve."

投资新技术不是可选的，而是能源未来的必要条件。

地球是有生命的这一想法处于科学可信度的边缘，但并未超出其范围。