I drowned a mouse that I caught in a live trap in a bucket of water.
I caught a mouse in a live trap and then put the trap in a bucket of water until the mouse drowned.
ーI drowned a mouse that I caught in a live trap in a bucket of water.
「生けどり罠で捕まえたネズミをバケツの水の中で溺れ死にさせた」
to drown で「溺れ死にさせる」
a live trap で「生けどり罠」
ーI caught a mouse in a live trap and then put the trap in a bucket of water until the mouse drowned.
「ネズミを生けどり罠で捕まえて、ネズミが溺れ死にするまでバケツの水の中につけた」
to catch a mouse で「ネズミを捕まえる」
to put the trap in a bucket of water で「罠をバケツの水の中に入れる」
ご参考まで!