Graptolites
(graptolite 的复数) n.[古生]笔石( 古元脊椎动物, 现存化石 )
🗣️ 情景例句
I don't know if I can get to sleep.
我不知道我能否睡得着。
To swing
打秋千
Happy birthday! said Polly, and gave Ann her present---a red feather.
“生日快乐！”波利说，然后给安送礼物--一根红羽毛。