A mature cow has horns.

成年母牛头上长有角。

《柯林斯英汉双解大词典》

Switzerland isn't all cow bells and yodeling, you know.

你知道，瑞士不仅仅只有牛铃声和约德尔调歌声。

《柯林斯英汉双解大词典》

A cow stood on the tracks.

一头奶牛站在铁轨上。

《柯林斯英汉双解大词典》

A calf is a young cow. A young female cow, especially one that has not yet had a calf, is called a heifer: H-E-I-F-E-R.

VOA: special.2009.07.21

The answer is 2200 liters of barley, 526 of olives, 468 of wine--I hope you remember all this; fifteen rams, one fat hog, one cow, and two bulls.

答案是两千二百升大麦,五百二十六个橄榄,四百六十八桶酒--我希望你们全能记住,十五头公羊,一头肥猪,一头母牛和两头公牛

耶鲁公开课 - 古希腊历史简介课程节选

Even--or a large animal like a cow.

而像奶牛这样大的动物就更难保存了

耶鲁公开课 - 生物医学工程探索课程节选

Defra officials gently pointed out that perhaps the "kill-a-cow, save-the-world" policy might have a few flaws.

BBC: Whitehall turf war saves cows' hides

And just last week, she was working on a nearby farm, walking outside -- apparently, chasing after a cow -- (laughter) -- when she collapsed.

WHITEHOUSE: Health Insurance Reform Right Now

"It could also be some strange, quasi-elaborate hoax meant to embarass Zuck with Eminem references and a silly game called 'Cow-a-bungee, '" Adam Clark Estes wrote for Motherboard.

CNN: Was this Mark Zuckerberg's first website?