上升下降英语

it has been decreased

up downrise fall

it has been a decrease in...There has been a decrease in our imports. 我们的进口减少了。

上升，up， rise， increase，ascend。 下降，down，sink，decrease，descend

上升;ascent, climb up, heightening,uprising,raise下降：descend，drop ，go down,decline,plunge

。。。up down

上升:increase, rise, grow, decline, reach a peak, fluctuate(有起伏，中性词）, double, maintain a trend下降: decrease, drop, fall, treble, 常用来修饰上述动词的形容词有和副词有：rapid(ly), dramatical(ly), slight(ly), sharp(ly), gradual(ly), quick(ly), supervising(ly), wildly, mildly另外飞机起飞是 take off降落是 land down