The walls of the educational system must come down. Education should not be a privilege, so the children of those who have money can study.
解释:大部分鸟类都是雄性的,而雌鸽却是雌性的,说明了鸟类性别的特殊性。
宇宙不仅比我们想象的更奇怪,它比我们能想象的还要奇怪。