Toothbrushing
(toothbrush 的现在分词) n. 牙刷
🗣️ 情景例句
It's nice to be alone with you, Grandpa.
很高兴单独与你在一起， 爷爷。
How long will you remain there?
你将会在那里逗留多久？
and there is a virtual limit on how long we can hope to remain alive,
我们所希望的长寿实际上是有限度的。