¡i©ú³ø±M°T¡j¡»bread and butter It refers to an activity by which somebody makes a living. e.g. Please don't fire me! This job is my bread and butter. ¡»butter up It means "to please somebody with a lot of good words". e.g. Having buttered up his boss, he got promoted. ¡»a knife through butter It means "without obstacles". e.g. The construction work was finished like a knife through butter. [Smarties' Power English ²Ä233´Á]
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