merely是什么意思

infatuation[英][ɪnˌfætʃuˈeɪʃn][美][ɪˌfætʃuˈeʃən]n.热恋，迷恋; 复数：infatuations例句:

1.This is not a recent infatuation. 这么做并不是一时的迷恋。

2.Anthropologists say the short-lived infatuation of the passion stage is merely mothernature's way of ensuring the survival of the species. 人类学家说激情阶段短暂的痴心只不过是大自然保证物种延续的方式。