1)historic: famous in history, 历史上著名的 associated with past times 与过去时代有关的

a ~ event/speech/spot

historical: belong to history 历史上的

a ~ people/novel/play/film/painting

~ trend

2) electric: worked by, changed with， producing electricity 用电的，带电的, 有电的

~ current/cable

electrical: relating to electricity, an idea of a less close connection with electricity

~ engineering/apparatus

3) economic: of economics

~ policy/geography/crisis/crops

economical: careful in the spending of money and time, not waste 经济的，节俭的

an ~ housewife/store

4) industrial: of industries 工业的

the ~ revolution/products/system

industrious: hard-working, diligent

~ people

5) considerable: great much 相当多（大）的

a ~ income/distance

considerate: thoughtful 体谅的， 体贴的 周到的

She is ~ to others.

6) sensible: reasonable, having good sense 实用的， 明知
 

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