Substituting
n. 代入；取代
✅ 同义词
🗣️ 情景例句
so I can study it.
以便我好好研究。
Friends are lost by calling often and calling seldom.
交往过密过疏，都会失去朋友。
Why not take a friend with you?
为什么不邀上个朋友和你一起去呢？