However, because the filamentresistance varies nonlinearly under the influence of temperature, the error of the calculating result is always great.
由于灯丝电阻受温度影响而呈非线性变化，因而计算的结果一般误差很大。
2
Edison's lab put a lot of effort into making a bulb with a platinum filament, but that work went nowhere, because platinum has a relatively low resistance.
爱迪生的实验室为制造铂丝灯泡付出了大量的努力，但这些投入都白费了，因为铂的电阻相对较低。
3
The resistance of the metal-filament lamp increases, and that of the carbon-filament lamp decreases with increase of current.