1·I watched skeptically as he wrapped a tin can with a piece of drawing paper dampened with a special liquid, then linked the can to the positive pole of a battery.
我心怀疑虑地看着他用一张被特殊溶液浸湿的图画纸把一只锡罐包起来，然后将锡罐与电池的正极连接好。
2·Drag onto the page. the longer line represents the positive pole.
拖到绘图页上。较长的线代表正极。
3·The longer line represents the positive pole .
较长的线代表正极。
1·This paper introduced the design of a new type salt heat exchanger on the principle of sacrifice of the positive pole.
本文针对盐水预热器的破坏特征，以阳极牺牲法为依据，设计了一种新型盐水预热器。
2·Make an approach to the factors that effect the quality of cast aluminium positive pole oxidized colouring, based on this optimum technology, find out the way of getting the optimum membrane layer.
探讨了影响铸铝阳极氧化染色质量的因素，据此优化工艺，找出得到最佳膜层的方法。
3·This article introduces in detail the design and the installation process of sacrificed positive pole protection system.
文章具体地介绍了牺牲阳极保护系统的设计及安装工艺。