| 例句 |
The blocks of stone had to be lifted into position with a system of pulleys.这些石块得用滑轮组牵引到位。We fixed the pulleys so that the rope had free play.我们装上了滑轮，这样绳索就能自由滑动了。Our flag is raised to the top of a pole by a rope and two pulleys.我们的旗帜被用一根绳子和两个滑轮升到了竿顶。The men raised up the barn's walls with pulleys.这些男人利用滑轮把畜棚的围墙立了起来。The Pyramid blocks were hauled into position without benefit of wheels or pulleys.金字塔的石块是在没有借助任何车辆或滑轮的情况下被拉到所在位置上的。Levers and pulleys are simple machines.杠杆与滑轮是简单的机械装置。The blocks are raised by means of pulleys.那些大块物件是借助滑轮吊起来的。 |