Replacing
v. 替代；更换（replace的ing形式）
🗣️ 情景例句
Anybody who drinks too much can be called a boozer.
喝酒太多的人叫酒鬼。
That's nothing.
你这哪算什么？
However, rescue operations are proving difficult.
然而，事实证明营救工作非常困难。