寂若死灰
词典silent：沉默的，无言的；寂静的，无声的；静止的；[语]不发音的。
1. 土卫二为何如此活跃还是个未解之谜，因为与土卫二毗邻、大小相近的土卫一似乎寂若死灰。 Why Enceladus is active remains a mystery, as the neighboring moon Mimas, approximately the same size, appears quite dead.