Definition: to become less, or to make something become less Level: B1
夏季时，取暖燃料的需求会下降。
During the summer, the demand for heating fuel ___decreases.
政府正在采取措施以减少交通污染。
The government is taking steps to ___decrease traffic pollution.
我们必须努力缩小贫富差距。
We must work hard to ___decrease the gap between the rich and the poor.
