1、 distinctive和distinct
distinctive"有特色的"，"独特的";
distinct"清楚的，明显的";
a distinct smell of alcohol on his breath;the distinctive stripes of the zebra.
2、 dual和duel
dual"二重的";
dual personality双重人格;dual control双重管辖;
duel"决斗，竞争";
fight a duel with sb.与某人决斗;
challenge sb. to a duel向某人提出决斗;
a duel of wits斗智
3、 eatable和edible
eatable a."可食用的，可吃的";n.[pl.]"食物、食品"
edible a."适合食用的，可以吃的";n.[pl.]"食品"
在指吃的时候二者可通用：
The toast was burnt and barely eatable/edible.
但在其他情况下不一样：
If something is eatable，it may be eaten(though it may not be safe or desirable to do so);but，if something is edible it is safe to eat.
4、 economical和economic
economic"经济学的，经济上的"an economic survey of Scotland苏格兰经济调查;an economic blockade经济封锁;economical"节俭的，经济的";He's had to learn to be more economical now that his only income is a small pension.
5 、evoke和invoke
evoke"唤起，引起";evoke admiration引起羡慕。
invoke"祈求(神灵)保佑，乞灵于"，行使(法权);
The shaman invokes the spirits of their ancestors. If our case fails in the national courts we will invoke the European Declaration on Human Rights.
6 、fatal和fateful
fatal "causing death or disaster""致命的";
a fatal disease不治之症;
a fatal wound致命伤。
fateful "crucial，significant，deciding one's fate""重大的"，"决定性的，决定命运的";
On that one fateful day in October，millions of pounds were wiped off the value of shares.
7 、fictional和fictitious
fictional"虚构的，小说的"。
fictitious"虚构的，编造的"(denotes something that is not real and has been created with the intention of deceiving others);
He gave the police a fictitious name.
8 、historical和historic
historical"有关历史的"，"历史的"，the historical period历史阶段;historical personage历史人物。
historic"历史上有名的，有历史意义的"，historic town历史名城。
9、 impassable和impassible
impassable"不能通行的"，"不可逾越的";an impassable swamp不能通行的沼泽地。
impassible"不感疼痛的;无动于衷的";an impassible God无动于衷的神。
10、 infer和imply
infer"猜想，臆测"，"推断";infer a motive from an effect从效果推知动机。
imply"含有……的意思";
Do you realize what his words imply?你领会他说话的含意吗?
I do not imply that you are wrong.我的意思不是说你错了。
11、 impractical和impracticable
impractical(not sensible or efficient or not actually possible)
"不切实际的，不现实的"。
impracticable(not able to be done or used)"不能实行的，行不通的";
With a river on one side and a steep drop on the other，it is impracticable to widen the road.
12、 incredible和incredulous
incredible"不可相信的，难以置信的";incredible energy惊人的能量，精力。
incredulous"不相信的，表示怀疑的";
be incredulous of hearsay不相信道听途说;an incredulous look怀疑的目光。
13、 ingenious和ingenuous
ingenious"机灵的";
an ingenious mind机灵的头脑;an ingenious machine精巧的机器。
ingenuous"直率的，坦白的"。
14、 intense和intensive
intense"激烈的，强烈的"，"紧张的"
an intense light强烈的灯光;intense heat酷热;
an intense life奋发图强的生活。
intensive"加强的，集中的"："深入细致的，彻底的";
an intensive bombardment密集炮击;
an intensive study彻底的研究;
an intensive reading精读(opp. extensive reading泛读)。
15、 junction和juncture
junction"接合，连接"，"(河流的)汇合处";
make a junction取得联络，连接起来junction box接线盒。
juncture(a particular point in time or in a sequence of events)"接合，连接"，"时机，关头";
an important juncture in a man's career人生历程中的重要关头;
at this juncture在这个时候;
in the present critical juncture of things在目前这一危急关头下。
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