It would be a crime to have a race horse do the work of a cart horse.
把赛马当役马是愚蠢的。
If somebody give you a horse, do not seek its age in its teeth.
送马当礼物，不可验牙齿。
Tom was leading the field in hunting.
汤姆在狩猎时一马当先。
A black horse was on the inside track at the start of the race.
赛马一开始，一匹黑马便一马当先，冲到内圈。
piece of metal held in horse's mouth by reins and used to control the horse while riding.
放在马嘴中当缰绳用于骑马时控制马。
We ought to start at once.
我们应当马上动身.
riding a horse as a means of transportation.
骑马来当作交通工具。
When you sit on a horse, you sit on the house's back.
当你骑马，你骑在它背上。
[Matters were getting embroiled with Rome.
（当时正和罗马发生磨擦。）
He earns his living as a jockey.
他靠当赛马骑师为生。
an ancient Roman unit of length equivalent to 1620 yards.
罗马长度单位相当于码。
When the wolf grow old , the crow ride him .
狼老威风失，乌鸦当马骑。
Watch out for cars when you cross the road.
过马路时当心车辆！
Use caution when you cross a busy street.
过热闹的马路时要当心。
When the wolf tried to eat the horse's tail, the horse kicked him as hard as he could.
当饿狼要吃马尾巴时，马儿猛力一踢，
Staunton and Macartney Embassy to China;
托马斯·斯当东与马戛尔尼使团使华
An Illiterate Cobble Becoming the Emperor s Son-in-law--A Study on the Type of Story like the Cobble Becoming the Emperor s Son-in-law;
“一字不识”当驸马——“皮匠驸马”故事论析
He does his work anyhow, without taking any care or trouble over it.
他干起活来马马虎虎，既不当心，又不认真。