Piltdown
皮尔丹(英国地名)
🗣️ 情景例句
Don't open the door if you don't know who it is.
如果有陌生人敲门不要开门。
He is playing on the see-saw in the yard.
他正在院子里玩跷跷板。
Will you please sweep the floor and tidy the classroom every day?
请你们每天都打扫地板、整理教室，好吗？