Parental investment is the key to understanding sex differences in mating strategies.

哲学是一场与语言的咒术对抗的战斗。

我不是为了钱说唱，我是因为热爱。

The Vietnamese people deeply love independence, freedom, and peace. But in the face of a threat to their country's independence and freedom, the Vietnamese people would rather sacrifice everything, not afraid to lose their lives, to defend the independence and freedom of their homeland.