不怀疑英语怎么说

there is no doubt that ...

毫不怀疑 [词典] make no doubt of; [例句]她毫不怀疑是他在她的牛奶里下了药。She had no doubt that it was he who had doctored her milk.

There is no doubt that...例如:There is no doubt that South China Sea is part of China.毫无疑问南海是中国的一部分。