源于: has its origins in...
后悔: to regret, to repent...
降落: to descend, to land...
相互: each other, mutual...
杂志: magazine...
分别: to part or leave each other, to distinguish, difference, in different ways, differently, separately or individually...
隔: to separate, to partition, to stand or lie between, at a distance from, after or at an interval of...
抽象: abstract, abstraction...
单身: unmarried, single...
必需: to need, to require, essential, indispensable...
