1.
Optimum design for double-horse head beam pumping unit with rear horse head′s outline of spiral of Archimedes
阿基米德螺线双驴头抽油机优化设计
2.
Two-horse head beam pumping unit rod load and torque variation
双驴头游梁式抽油机悬点载荷及扭矩变化规律
3.
Research on Rod Load and Torque of Twin-horse Head Beam Pumping Unit
双驴头游梁式抽油机悬点载荷及扭矩研究
4.
Optimum design for double-horse head beam pumping unit is a question of non-linear programming with inequality constraint condition and multi-objective function.
双驴头抽油机优化设计是一个具有不等式约束多目标函数的非线性规划问题。
5.
"She can take the donkey. We have a donkey.
“让她骑驴好了，俺们家还有一头驴。
6.
This donkey can carry two sacks of grain.
这头驴能驮两袋粮食。
7.
He belaboured the donkey mercilessly.
他恶狠狠地猛抽那头驴.
8.
mule-head hanger
驴头上挂抽油杆的装置
9.
So he gets on one of them.
于是他骑上了一头驴。
10.
What an ass that doctor is!
他真是头驴子，这医生！
11.
There were twenty-four donkeys pulling the stagecoach.
拉马车的是廿四头驴子，
12.
For fun, Puck decides to turn Bottom's head into a donkey's.
他一时兴起，决定把巴腾的头变成驴头。
13.
double-head arrow
双箭头(双头指针)
14.
so the donkey must be more intelligent than the old man!
看来驴一定比那老头聪明的多
15.
This old donkey is a good quiet mount for a child.
这头老驴性情温和,是孩子的好坐骑。
16.
The cruel man was hitting the donkey.
那个残酷的人正在抽打那头驴。
17.
Stop thrashing the donkey,you cruel boy.
不要鞭打那头驴,你这个残忍的孩子。
18.
Two colored boys walk by, leading a mule by the halter.
两个黑人小伙子牵着一头驴子走过。