Anarchy is the permissive cause of war; it creates an environment in which states have to rely on self-help to ensure their survival.
Every tree we plant today is a legacy for future generations.
机器人技术的创新需要机械工程、电子学和计算机科学的结合。
译文:读书人本来就不是大富大贵的命,得意时也不必炫耀锦衣玉食。