the year of ox牛年

a herd /team of ox一群牛

have a cow 生气

Don't have a cow! I said I'd take care of the problem and I will.

holy cow!=OMG天呐

Holy cow! That car almost ran into us!

cow bells

until/till the cows come home很长时间

They'll be arguing about this till the cows come home.

They were cowed by threats.害怕,受到惊吓