in operation or operational a
indicates continuity or persistence or concentration r
in a state required for something to function or be effective
on a barter basis
以易货方式
on a basis of
以...为基础
on a bicycle
骑自行车
on a bum
在闹饮中
on a calculation
根据估算,据估计
on a cash-on-invoice basis
[经] 按发票现金付款方式
on a charge of
[法] 以...罪名
on a charge of robbery
因被控抢劫罪
on a crash basis
应急地,紧急地
on a diet
按规定进食,进规定的饮食
on a dime
在很小的范围内;立刻
on a fifty-fifty basis
平分, 对等地
on a firm footing
在牢固的基础上
on a friendly footing with
与某人相处和睦
on a full stomach
吃饱肚皮,满腹
on a higher floor
[网络] 在更高的楼层
on a hike
远足,作徙步旅行
on a jag
酩酊大醉
on a kick
不再热心,不再迷恋
on a large scale
大规模地
