单词	back bulb
释义	back bulb noun : a pseudobulb on certain types of orchid plants that remains on the plant after the terminal growth has been removed and is used in the propagation of certain orchids Word History First Known Use 1942, in the meaning defined above
随便看	step up step up the pace step up to the plate step ups step ward step wedge step-and-repeat step-by-step step-by-step telegraph step-cline step-cone pulley step-down step-downs step-hop step-in step-off step-on step-ups stepbairns stepbrother stepbrothers stepchild stepchildren stepdad stepdads

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