e-bikeWiktionary 原文构词拆分e-前缀(no longer productive) Used to form terms with the sense of something being absent, being removed, or moving outward.+bike词根/词干词源说明From e- + bike.释义（英文）名词 Noun(informal) A bicycle assisted by, or powered by, an electric motor.词族派生词（1）e-biker