1.
The machinery operates continuously.
机器不停地运转着。
2.
The engine was labouring.
引擎艰难地运转着。
3.
machines kept running night and day
日夜不停运转着的机器.
4.
The old machine keeps running day and night.
那台旧机器依然夜以继日地运转着。
5.
The frightful apparatus worked smoothly without a sound.
这可怕的装置无声无息地平稳运转着。
6.
Machines in operation are subject to loss of useful energy due to friction.
运转着的机器由于磨擦关系而会失去一些有用的能量。
7.
We watched the machine in action.
我们瞧着机器在运转。
8.
The planets revolve around the sun.
行星绕着太阳运转。
9.
Operating to produce effects; effective.
运转中的操作运行着的，起作用的
10.
As a companion star orbits its primary, it alternately approaches and recedes from the Earth.
当伴星围绕着主星运转时，它交替地朝着地球或背离地球运转。
11.
It took almost three months of effort to secure photographic permission from the proper dervish authorities.
他们的旋转代表着所有的星星围绕着安拉运行。
12.
and follows an orbit round the sun,
它依循一定的轨道绕着太阳运转，
13.
We all know that the earth travels round the sun.
我们都知道地球围绕着太阳运转。
14.
Angular momentum can accompany nonrotational motion.
非旋转的运动可能伴随着有角动量。
15.
All the eight planets go round the sun the same way. Each of them also turns of its own axis.
八大行星都围绕太阳运转，每个行星也绕着自转轴自转。
16.
The planet is probably in orbit around a small star.
这颗行星可能在围绕着一颗小恒星运转。
17.
A fortunate turn of events meant that he could be present on such an occasion.
一次幸运的转机意味着他能够出现在这一场合。
18.
the five major planets each have their own orbit, but all revolve around the sun.
五星各有各的运行轨道, 但都绕着太阳公转。