1. 来回奔走：beat off 击退,打退(进攻) | beat up and down 来回奔走 | before long 不久以后
2. 往返奔走：beat off 击退,打退(进攻) | beat up and down 往返奔走 | begin with 以...开始;开始于
3. 往返奔忙：beat off 打退,打退(防御) | beat up and down 往返奔忙 | begin with 以h开始;启初于
1. I stock up on these whenever I find them and you have to be nimble on your feet to beat other competitors down the aisles.