1.
The child was rolling a hoop.
那个孩子在滚铁环。
2.
The boys rolled their hoops down the street.
男孩子们在街上滚铁环。
3.
The hoop rolled along the pavement.
圆环沿人行道滚动.
4.
The Breakage and Malfunction's Analysing of the 100t Liquid Iron Train's Rolling Bearing
100t铁水车滚动轴承破损故障分析
5.
The ring teeth hob can realize high efficient radialfeedhobbing.
环纹滚刀可以实现高效率的径向进给滚齿加工。
6.
DYNAMIC ANALYSIS AND SIMULATION OF A RE-CIRCULATION MECHANISM IN BALL SCREW
滚珠丝杠副滚珠循环系统的动力学研究和仿真
7.
jack for lifting railway rolling-stock or track, hydraulic
液压千斤顶起升铁路滚动托架及轨道用
8.
The boys rolled the football field with a heavy iron.
男孩子用一个重型铁滚子将足球场轧平。
9.
Fatigue Strength and Fillet Rolling Study of Ductile Iron Crankshaft for YC6108ZQ Diesel Engine
YC6108ZQ柴油机球铁曲轴疲劳强度及圆角滚压研究
10.
mark aimed at in certain games,eg quoits,bowls,curling
（掷环、滚木球、冰上溜石游戏的） 目标.
11.
VB-Based CAD System for Gear Cutter Hob
基于vb环境的滚齿刀辅助设计系统
12.
The Puwei Wreath Depression to Explore the Exploration and DevelopmentFulfillment
东濮凹陷滚动勘探开发实践——东濮环洼
13.
roller bearing spindles for ring spinning frames and ring twisting frames
环锭纺纱机及环锭捻丝机用滚子轴承主轴
14.
To increase the contact area and permit larger loads to be carried, the balls run in curvilinear grooves in the rings.
为了增加接触面积并承受较大载荷，滚珠在内外环的曲线槽内滚动。
15.
ball recirculating nut steering gear
用封闭循环滚珠螺母[用螺杆和滚珠螺母]的转向机构
16.
Apparently they think they are stronger than their rails, which are too soft to stand the heat.
看来他们似乎觉得自己比耐不住酷热的铁轨还能抗得住这滚滚热浪。
17.
The links of the dog's chain are small.
拴狗的铁环是小的。
18.
to disunite the links of a chain
拆开一条铁链的链环