supposedly

These detergents are supposedly better for the environment.据说这些清洁剂更加环保。

He has supposedly changed since then, but I'm doubtful that he really has.据说从那以后他变了，但我怀疑他是否真的变了。

Supposedly, she left a message on my answering machine. I never actually got it.她有可能在我的答录机上留了信息，但是我真的没有收到。