reduce

我们可以通过回收利用来减少垃圾数量。

We can ___reduce the amount of trash by recycling.

加点牛奶可以稀释咖啡的苦味。

Adding milk can ___reduce the bitterness of the coffee.

政府正在采取措施减少空气污染。

The government is taking measures to ___reduce air pollution.