pyramid selling
US /ˈpɪr.ə.mɪd ˌsel.ɪŋ/
UK /ˈpɪr.ə.mɪd ˌsel.ɪŋ/

1.
金字塔销售, 传销
a system of selling goods in which people are paid to sell products, but are also paid for recruiting other people to sell them. This system is illegal in many countries.
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The company was shut down for engaging in pyramid selling.
该公司因从事金字塔销售而被关闭。
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Many people lost money in the pyramid selling scheme.
许多人在金字塔销售计划中蒙受损失。