1)decline,下跌;衰退2)big slump,大衰退(暴跌)3)a period or process of declining; movement to a lower or worse position,衰微,衰退,下降4)To fall away or back;decline or recede.,回落跌落;衰退或消减5)decline of subsurface flow,地下水流的衰退6)decline,下倾;低落，衰退
用法例句
The decline of subsurface flow in soil slope due to rainfall infiltration has been studied with numerical analysis.
