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Designing with mark-up is like welding i-beams without a blueprint .

设计过程要额外付费就好比焊接钢材不需要蓝图。

The fumes produced by welding metal often contain small amounts of manganese .

在焊接金属时所产生的烟雾中，常常包含了少量的锰。

Robots efficiently carry out such routine tasks as welding , drilling , and painting automobile body parts .

机器人能有效地做那些重复性的劳动，如焊接、钻孔和为汽车零部件喷漆。

They make precise but rigid movements , which is what you need when welding a car body .

它们的动作精确，但很机械，在焊接汽车车身的时候，这正是人们需要的。

Other women , their husbands or boyfriends off to basic training , learned to drive trucks or handle welding torches .

另一些女人的丈夫或男友被召去进行基本训练，她们只得学着驾驶卡车或使用焊接喷灯。