年降英语怎么说

The annual rainfall is less than 5 cm.

many high school student' healthy condition reduce every year.

The annual precipitation is less than five centimetre.Precipitation 名字降雨量，降水量Annual 每年的，一年一次的

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1、decrease

vi. become smaller or fewer in size, amount, intensity or degree

减少，减小，减弱，降低

vt. make smaller or fewer in size, amount, intensity or degree

使减小，使减少

n. an instance or example of becoming smaller or fewer

减小或减少

2、fall

vi. decrease in number, amount, intensity or quality

减少，下降

In 1987 imports into Britain fell by 12 per cent.

1987年，英国进口降低了12%。

3、reduce

vt. make smaller or less in amount, degree, or size

减少（数量），降低（程度），缩小（规模）

the need for businesses to reduce costs

公司降低成本的需要

vi. become smaller or less in size, amount, or degree

（规模）缩小，（数量）减少，（程度）降低

the number of priority homeless cases has reduced slightly

被优先照顾的无家可归者人数已微幅下降

4、down

to or at a lower price, value or rank

（价格、价值或等级）由高到低

output was down by 20 per cent

产量下降了20%

5、drop

v. make or become lower, weaker or less

（使）降低，（使）变弱，（使）减少

pre-tax profits dropped by 37 per cent

税前利润减少了37%

n. a fall in amount, quality or rate

（数量、质量、比率的）减少，降低

a significant drop in consumer spending

消费者开支的显著减少

a trend of decreasing per year

表示下降的英语单词

down,副词、形容词、名词、介词、动词,作副词时意为"向下;在下面;(坐、躺)下;下降;(数量、力量等)减少;由上至下;向(或在)南方;(写)在纸上;(列)在表格上;(写)在纸上失去(钱数);预付;已完成数量(或进度);到等

短语

1、 down on突然意识到2、 go down下降;平静下来;传下去;被接受3、 down with打倒;把.拿下4、 ups and downs沉浮;盛衰;高低5 down through?在整个的时间里6、 right down[口语],非常,无限,十足的,地地道道的,明明白白地;无隐瞒地7、 down to the ground彻底地,完全;在一切方面8、 down and out贫困潦倒的;被击倒不能再战的9、 down below ady.在底下10、 go down with被接受;染上疾病down的短语:down on?突然意识到go down下降;平静下来;传下去down with打倒;把.拿下ups and downs r.沉浮belt down在上迅速移动cast down把投向.draw down沿着.向下拉