Substantiating
v. 用事实支持（某主张、说法等）, 证明, 证实( substantiate的现在分词 )
✅ 同义词
🗣️ 情景例句
Are they always that difficult to make?
领结这样难打吗？
Pupil. He is studying.
学生。正在学习。
Fine.let's get together again next week.
好吧，那就下周再聚会了。