虽然它们很重，但工人们每三分钟就能把一块石块放进金字塔里。
Although they were heavy, workers were able to put a block into the pyramid every three minutes.
电话接线员对每三分钟的课程收费2分。
Mobile operators charge about two cents for each three-minute lesson.
否则，每三分钟，人就改变了他们的爱。
Otherwise, every three minutes, people begin to change their love.
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