相關(guān)單詞近義詞 backtrack 由原路返廻, back down 放棄, recant 放棄主張, retreat 撤退, back off 後退臨近詞backsaw, back, backstep adaptive control, back propagation networks, backpropagation algorithm, backcrossed introgression, back periodical resources, back-and-forth method, Back to the Secret Garden, backpressure relief valve, back-coupling condition, back projection algorithm相似詞backlog, backpack, backpacker, backpacking, backroom, backroom boys, backseat driver, backside, 返回 backpedal