a happy eventeiˈhæpiiˈvent短语⁹⁶⁶⁷⁷⁺⁶ 基本例句 na.可喜的事；🌏一件开心的事；一件幸福的事；快乐孕记 For the past seven thousand years, sea levels have stayed remarkably stable, a happy event that allowed human civilization to develop and prosper. 在过去的七千年里，海平面一直显著地保持着稳定，使人类文明得以发展和繁荣。 yeeyan