Indemonstrable
a. 不能证明的
✅ 同义词
🗣️ 情景例句
... and I do need some advice on a difficult problem.
……我的确有一个难题要请教你。
You were here in February,weren't you?
二月份你曾在这里，对不对？
I've never laughed so much in all my life.
我这一生还从来没有笑得这样开心过呢。