短語詞組短語slack -off weight 下放時鉆具重量slack k off 滯銷Slack off the sail 把帆放松Slack Off A Little 放松一點Don T Slack Off 不要偷懶to slack off 松懈slack off weaken 由強(qiáng)轉(zhuǎn)弱slack off in study 學(xué)習(xí)松懈slack off test 慢鉆試驗 返回 slack off