1. 名詞
   crack複數: 裂縫, 裂痕
   裂紋
   爆裂聲
   尖銳的斷裂聲
   猛烈的...(幾)擊
   聲音尖銳的重擊
   片刻, 時分
   挖苦, 取笑
   瑕疵, 缺點
   (突然的)變聲
   

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   同義字詞
   check,chink,cleft,cranny,crevice,fissure,rift,split
   bang,bash,bat,beat,belt,blow,bop,box,buffet,bust,chop,clap,clip,clout,cuff,dab,fillip,hack,haymaker,hit,hook,knock,lash,lick,pelt,plump,poke,pound,punch,rap,slam,slap,slug,smack,smash,sock,spank,stinger,stripe,stroke,swat,swipe,switch,thud,thump,thwack,wallop,welt,whack,wham,whop,whap
   bang,blast,boom,clap,crash,pop,report,slam,smash,snap,thunderclap,thwack,whack,whomp,whump
   attempt,bid,endeavor,essay,fling,go,offer,pass,shot,stab,trial,try,whack,whirl
   drollery,funny,gag,jape,jest,joke,laugh,one-liner,pleasantry,quip,rib,sally,waggery,wisecrack,witticism
   character,codger,crackbrain,crackpot,crank,eccentric,flake,kook,nut,oddball,oddity,screwball,weirdo,zany
   

2. 動詞
   crack第三者單數現在式:
   不及物動詞:
   爆裂
   裂開, 斷裂
   發出爆裂聲
   崩潰, 瓦解
   嗓音等: 變粗, 變啞
   及物動詞:
   使...(物)爆裂
   使...(物)破裂
   

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   同義字詞
   pop,snap
   break down,break up,flip (out),freak (out),melt down,wig (out)
   break,decipher,decode,decrypt
   bang,bash,bat,belt,bludgeon,bob,bonk,bop,box,bust,clap,clip,clobber,clock,clout,hammer,hit,knock,nail,paste,pound,punch,rap,slam,slap,slog,slug,smack,smite,sock,strike,swat,swipe,thump,thwack,wallop,whack,whale,zap
   answer,break,dope (out),figure out,puzzle (out),resolve,riddle (out),solve,unravel,unriddle,work,work out
   craze,derange,frenzy,madden,unbalance,unhinge,unstring
   

例句

1. The cracks are much better visible.
2. Rain, and several cracks of lightning.
3. We were naïve, the cracks began to show.
4. But, all of that fell through the cracks .
5. The question was how the cracks got there.
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