1. In Taiwan, the word 垃圾 is pronounced as 垃圾.

2. 做垃圾分类 is the action of separating garbage into various recyclable and non-recyclable categories. We see it used in the sentence 要是我们没有做垃圾分类，可能会被罚钱 and 所以平常就要做好垃圾分类.

3. 楼下 literally means “floor down”. We see it used in 那如果你住在公寓或是大楼里面，楼下应该会有一个地方可以丢垃圾.

Similarly, you could say 楼上.