世界悬于一线,那根线就是人的心灵。
森林面临的最大威胁不是砍伐,而是漠不关心。
免费的疫苗比昂贵的治疗更有价值,但更难推广。
The only relationship that can make both partners happy is one in which sentimentality has no place and neither partner makes any claim on the life and freedom of the other.