原级：ascertain
ascertains的反义词
现在分词：ascertaining
过去分词：ascertained
911查询·英语单词
过去式：ascertained
1. ascertains
1. CEF ascertains credit and assumes the burden of risk on the side of the buyer.
2. A mobile phone conversation ascertains the location of the room where the monks are presently meditating to music.