单爪龙类化石个头很小，样子有点像鸟，重量不到一千克。

Small and bird-like, the fossil weighed less than 1 kg.

youdao

单爪龙类化石个头很小，样子有点像鸟，重量不到一千克。

Small and bird-like, the fossil weighed less than 1 kg.

youdao