動詞 exact:

1. claim as due or just
   同義詞：demand, exact
2. take as an undesirable consequence of some event or state of affairs
   同義詞：claim, take, exact

形容詞 exacting:

1. having complicated nutritional requirements; especially growing only in special artificial cultures
   同義詞：fastidious
2. severe and unremitting in making demands
   同義詞：stern, strict
3. requiring precise accuracy
   同義詞：exigent

1. If the government goes on exacting so much from the taxpayer, it will not last long.
   如果該政府繼續(xù)如此征稅的話，它將不會持續(xù)多久。
2. An exacting task.
   一項費力的任務
3. I have so trained myself in secretarial work that only exacting problems are interesting to me.
   毫不夸張的說，我在文秘方面受過嚴密的訓練，越是難度大的工作越能激起我的工作熱情。
4. Overly concerned with details; exacting and fussy.
   過分注意細節(jié)的過于注重細節(jié)的; 苛求的和繁瑣的

ex.act.ing

adj.（形容詞）
Making severe demands; rigorous:
苛求的，嚴格的；難以取悅的：
例句：
an exacting instructor.
一名嚴格得近乎苛求的指導者

Requiring great care, effort, or attention:
艱巨的，吃力的：需要極為細致、極大努力或極高注意的：
例句：
an exacting task.See Synonyms at burdensome
一項費力的任務參見 burdensome

【引伸】
exact.ingly
adv.（副詞）
exact.ingness
n.（名詞）