There's a very thin dividing line between joviality and hysteria.欢天喜地和歇斯底里之间就一线之隔。I exulted and wept for joy.我欢天喜地，喜极而泣。Since their engagement, he's been walking on air.自从他们订婚以来，他一直是欢天喜地的样子。The birth of a live healthy baby is a truly blessed event.一个健康活泼的宝宝的诞生真是欢天喜地的事。