My new adult responsibilities began that night.

从那晚开始 我有了新成年人的责任。

In Japan, children throw a lower baby tooth up onto the roof so the next tooth grows healthily upwards; an upper tooth goes under the house so the new adult tooth grows downwards.

在日本，孩子会把下齿的乳牙放到房顶上，这样的话下颗牙将会长得结结实实；上齿牙会扔到地上，这让孩子的上齿牙会往下健康地成长。