The gauze disc serves to hold the coiled wick tightly against the fuel charge, while the back plate protects the washer.
纱网盘用于保持导火索盘紧靠燃料块，后盘用于保护垫圈。

Like that in a wax candle, a wick absorbs the fat and pulls it into the flame, where it is vapourised, so enabling it to burn.
脂肪在火芯上实际上是被汽化后再充分燃烧的。

For wick combustion, with the increase of oxygen concentration, the height of flame first increases to the peak value and then drops.
而对柴油灯芯火焰，高度的变化趋势是先增加后降低。