男性和女性在短期择偶欲望上存在差异，因为这对我们祖先的繁殖利益和代价不同。
"Men and women differ in their desires for short-term mating because the reproductive benefits and costs differed for our ancestors."
Customer satisfaction begins with understanding their unspoken needs and exceeding their expectations.
语法和语义之间的相互作用是形式语言研究的核心。
不要用很多词语说一点东西，而要在很少的词语中表达很多。