原因与结果
1. cause-suggestion (几乎不常用)
since / now that ...; I hope that...
because of/on account of/owing to/thanks to + (doing) sth, I hope that...
2. cause-effect (较常用)
XXX lead to / bring about / result in/ account for ...
(一个句子), therefore / thus / hence / as a result / consequently / (and) so ...
3. effect-cause (较常用)
XXX be caused by / result from / be the result of / be the effect of / be the consequence of ...
(一个句子), because ...
it is adj. that ...
it is unimaginable that ...
it is undeniable that ...
it is interesting to discover that ...
变化程度：sudden/suddenly 突然的，意外的
rapid/rapidly 迅速的，飞快的，险峻的
dramatic/dramatically 戏剧性的，生动的
significant/significantly 有意义的，重大的，重要的
sharp/sharply 锐利的，明显的，急剧的
steep/steeply 急剧升降的
steady/steadily 稳固的，坚定不移的
gradual/gradually 渐进的，逐渐的
slow/slowly 缓慢的，不活跃的
slight/slightly轻微的、略微地
stable/stably 稳定的