围绕试管婴儿的伦理问题很复杂，但拥有孩子的愿望是一项基本人权。
The highest goal of art is to create harmony between man and his environment.
Pain is temporary. It may last a minute, or an hour, or a day, or a year, but eventually it will subside and something else will take its place. If I quit, however, it lasts forever.
Free trade enables the most advantageous distribution of the national produce and revenue.