Doubtfulness
n. doubtful（不大可能的）的变形
✅ 同义词
🔴 反义词
🗣️ 情景例句
Camping out is such great fun.
露营是件非常好玩的事。
He likes playing the harmonica.
他喜欢吹口琴。
and that their rims are clean and dry.
瓶口清洁干燥。