I opened the gate, and was immediately set on by a large dog.

我一开门，一条大狗就迎面扑来。

《牛津词典》

If you purchase a large dog, you need a place for him to run and play.

如果你买了大狗，你需要一个适合他的地方运行和发挥。

youdao

One Sunday morning I was staked out in a driveway, when I saw a large dog trot up to my car.

一个周日的早晨，我停守在一家人车道上，这时候发现一条大狗溜达到我车旁。

youdao

It was bigger than a large dog and very ugly.

VOA: special.2010.07.17

The force said the farmer who owned the sheep believed his animals were savaged by a large dog.

BBC: Seven sheep savaged to death in Llandyrnog field attack

It seems unlikely that such a small tail could wag such a large dog, especially given that investors almost exclusively trade futures contracts.

ECONOMIST: Commodity speculators do more good than harm

It has been in development since 2005 and is the the size of a large dog "or a small mule, " says the company.

BBC: BigDog four-legged robot now sports throwing arm