My partner is on holiday this week so I'm filling in (for him).
我的合伙人本星期休假, 所以我暂代（他）一下.
An element, such as a plate, used to fill the space between two supporting members.
填料用来填充两个支撑物之间的空间的结构物，例如横木板
I am cooking a sponge cake with jam filling.
我在做果酱松糕。
