The concept of law is essentially a matter of social fact.
The boundaries which divide Life from Death are at best shadowy and vague. Who shall say where the one ends, and the other begins?
我不是说唱歌手,我是一个玛雅语的传奇。
科学没有国界,但科学家有祖国,我们要为国家农业发展贡献力量。
解释:只有放弃一些事情不做,才能在别的一些事情上做出成绩。