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历史:
TOEFL GRE BNC: 9591 COCA: 6692
bolster verb | noun
 1 
bol·ster / 5bolst[ ; 5bEJlstE /verb
also bolster up T
1. to help someone to feel better and more positive增强; 激励:
He is making a bold attempt to bolster the territory's confidence.他采取大胆行动,增强这个地区居民的信心。
2. to improve something改进:
his efforts to bolster his career他为了发展自己的事业所作的努力

 2 
bolsternoun C
1. a long firm PILLOW , usually shaped like a tube(圆柱形)长枕头垫

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