complexion
/kəmˈplekʃn; kəm`plɛkʃən/ n
1 natural colour and appearance of the skin of the face （天生的）面色, 脸色, 面貌
a good, dark, fair, sallow, etc complexion 脸色好、 黑、 白、 黄等.
2 (usu sing 通常作单数) general character or aspect of sth 某事物总的特性或方面
Her resignation puts a different complexion on things, ie changes one's view of the affair. 她一辞职则情随事迁（使人改变了对事务的看法）.
a victory that changed the complexion of the war, ie made the probable result different, gave hope of an early end, etc 扭转战局的胜利.