A mule is a cross between a horse and a donkey.

骡是马和驴杂交的产物。

《牛津词典》

Zebroid is the offspring of a cross between a zebra and any other equine, usually a horse or a donkey.

杂交斑马是斑马和其他马科动物的杂交后代，通常会是和马或驴杂交。

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For example, take the case of a horse that refuses to jump a small cross bar that he has jumped many times before.

举例来说，假如一匹障碍马在一处它已经成功跳过很多次的交叉杆前拒跳了，出现该情况的是同一匹马，不同的两个骑手。

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One theory is that somebody is using Mr. Trump as a stalking horse to find out how New Hampshire voters would feel about a politically cross-dressing billionaire businessman from New York City with a high media profile -- say, Mike Bloomberg.

WSJ: You're Fired, Mr. President!

Over a course of 10 to 12 obstacles, it is easier than the actual showjumping event, but tough on a horse that has just completed the arduous cross-country section the day before.

BBC: SPORT | TV/Radio Listings | Grandstand | Three-day eventing explained

The only way to reach the restaurant is about an hour of cross-country skiing, snowshoeing, or a cold ride on a horse-drawn sleigh.

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