1. 形容詞
   清楚的, 明白的
   平易的
   簡單的, 平常的
   簡樸的, 樸素的
   無花紋的
   陽春的
   坦白的, 直率的
   完全的, 徹底的
   plain and simple:
   簡單明了的
   

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   同義字詞
   bald,bare,naked,simple,unadorned,undecorated,unembellished,unornamented,unvarnished
   absolute,fine,neat,pure,purified,refined,straight,unadulterated,unalloyed,undiluted,unmixed
   candid,direct,forthcoming,forthright,foursquare,frank,free-spoken,freehearted,honest,open,openhearted,outspoken,plainspoken,straight,straightforward,unguarded,unreserved,up-front
   direct,forthright,foursquare,straight,straightforward
   apparent,bald,bald-faced,barefaced,broad,clear,clear-cut,crystal clear,decided,distinct,evident,lucid,luminous,manifest,nonambiguous,obvious,open-and-shut,palpable,patent,pellucid,perspicuous,straightforward,transparent,unambiguous,unambivalent,unequivocal,unmistakable
   

2. 副詞
   清楚地, 平易地
   完全地, 徹底地
   plain and simple:
   簡單明了地
   簡單明了地說
   

   同義字詞
   directly,forthrightly,foursquare,plainly,straight,straightforward,straightforwards,straightforwardly
   

3. 名詞
   平原, 曠野
   /以上複數為"plains"/
   限定不可數名詞:
   針織的平針
   通常為複數plains:
   平紋布
   素色布
   

   同義字詞
   champaign,down(s),grassland,heath,lea,ley,llano,moor,pampa,prairie,savanna,savannah,steppe,tundra,veld,veldt
   breadth,distance,expanse,expansion,extent,field,length,reach,sheet,spread,stretch,waste
   

例句

1. This is just plain dumb.
2. It was a plain monument.
3. It's SPAM plain and simple.
4. This one was just plain bad.
5. Kanye is just plain pathetic.
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