Doubtfulness
n. doubtful（不大可能的）的变形
✅ 同义词
🔴 反义词
🗣️ 情景例句
Under these conditions of payment,-
在这种付款条件下，-
What did you talk about?
你们谈论了什么？
And this is Luming.He is Chinese.
这位是鲁明。他是中国人。