由于焊接金属与非焊接金属的腐蚀速率会不同，所以有必要研究两种情况。
Corrosion rates can vary between welded and non-welded metals, therefore it is advisable to study the behavior of both conditions.
与焊接金属片不同的是，软件工程师靠编写代码将原料有机的结合在一起。
Instead of welding pieces of metal, software engineers join stuff by writing code.
电效应。两种不同的金属焊接在一起可以将热能转化成电能。在炼油厂，根据这一原则，通过使用热电偶来测量温度。
Electrical effect. Two different metals welded together can transform heat energy into electrical energy. This principle is used in the refinery to measure temperature by use of thermocouples.
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