All behavior is motivated by some form of drive reduction.
所有行为都是由某种形式的驱力减少所驱动的。
世界是一个多样化的地方。
妈妈必须同时喂养孩子的身体和精神,且精神上的需求更重于身体的需要。
It's through curiosity and looking at opportunities in new ways that we've always mapped our path.