Replacing
v. 替代；更换（replace的ing形式）
🗣️ 情景例句
Maybe we can experiment with your patients
也许我们可以在你的病人中试试
Draw not your bow till your arrow is fixed.
事未齐备，切莫妄动。
We shall need two buses to meet people at the staton.
我们需要两辆公共汽车到车站去接人。