river可数吗牛肉beef可数吗

The river flooded the valley.

河水泛滥淹没了河谷。

The river gurgled and burbled.

河水汩汩流淌。

Now the river bed is bone dry.

目前河床十分干燥。

Kenya's beef comes from the zebu cattle.

肯尼亚的牛肉是瘤牛肉。

They serve the most delicious roast beef.

他们做最美味的.烤牛肉。

The smell of roast beef permeated the air.

烤牛肉的气味弥漫在空气中。