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对于平稳的趋势的描述:

1.可以使用的动词或动词词组:

to hardly change

to have little change

to keep steady

to level off

to remain constant

to stay the same

2.表示程度的副词:

a.程度较大:

considerably

dramatically

greatly

markedly

obviously

quickly

rapidly

sharply

significantly

suddenly

3.程度较小:

slightly

gradually

slowly

Steadily

时间的嵌入

1.嵌入时间时所使用的介词和介词词组:

in

from....to.....

between.....and..

during......and.....

at the beginning of......

by the end of......

over......

at the end of.......

throughout......

2.时间 's +具体数据

上升和 下降趋势的组合描述(嵌入了时间和程度之后);

先上升后下降的句型:

.... increased slowly during..... and ....but fell sharply in......

A steady fall in ..... during .... and ..... followed the sharp increase in ......

先下降后，上升的句型:

......fell before......began to make a recovery ....

......continue the recovery, climbing to......

......dropped during......but increased again in......

......fell and then pick up during......

......collapsed before rising to .... the end of......

起伏波动的句型:

......fluctuated sharply all through......

波动不大的句型:

......hardly changed through the period between .....and.......