catch: implies the seizing of something that has been in motion or in flight or in hiding: ~ the dog as it ran by. (seize抓住implies a sudden and forcible effort in getting hold of something tangible or intangible表示突然用力去抓住有形或无形的东西，如seized the crook as he tried to escape试图逃跑时突然用力抓住钩子, 如常说的to seize the opportunity抓住机遇，都强调突然和用力)
capture: suggests taking by overcoming resistance or difficulty: ~ an enemy stronghold. 要塞据点 如captured 90% of the market/a city/500 soldiers/the imagination/the mood of the nation占据市场份额/占领城市/俘虏士兵/激发想象力/表现国民情绪=express well
trap,snare,entrap,ensnare: imply seizing by some device that holds the one caught at the mercy of one's captor. trap and snare apply more commonly to physical seizing: ~ animals(trap); ~d butterflies with a net; entrap and ensnare more often are figurative: ~ped the witness with a trick question(entrap); a sting operation that ~d burglars(ensnare). device泛指任何器件装置a thing made or adapted for a particular purpose, especially a mechanical or electronic contrivance特别是机械电子装置。工具也是一种器件device，这里译作工具 trap陷阱snare网
bag: implies success in seizing a difficult quarry by skill, stealth, or artifice, often with the suggestion of a hunter's craft: ~ged a brace of pheasants. （artifice诡计奸计巧妙虚构implies ingenious contrivance and invention，如his smile is just an artifice他的笑容只是假装。和artificial, art来自词根ART表示skill技巧） crafty机智巧妙implies cleverness and subtlety of method，如a crafty trial lawyer一个机智巧妙的庭审律师 习语in the bag表示十拿九稳探囊取物，如the election is in the bag大选十拿九稳，如the victory is in the bag稳操胜券
catch捕捉: 表示突然抓住正在跑动飞行隐藏的事物，capture捕捉: 强调克服抵抗，trap,snare,entrap,ensnare陷阱网罗: 都表示用工具捕捉，其中trap和snare表示实际捕捉，entrap和ensnare是比喻义，bag猎捕: 表示有猎人般的隐蔽巧妙机智
记忆方法: 1）首字母CCTSB常常不上套<==捕捉不易
2）练习一下
3）捕捉的意思是突然用力抓住占有控制mean to come to possess or control by or as if by seizing.首字母CCTSB常常不上套<==捕捉不易
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