serving in a shop or bank
站柜台；（在商店或银行）作服务员
by ordinary retail purchase, with no need for a prescription or licence
（不要处方或许可）直接购买
[as modifier]over-the-counter medicines.
非处方药。
(with reference to goods bought or sold) surreptitiously and typically illegally
（一般指非法的买卖）偷偷地；私下地
hard porn is legally banned, but still available under the counter.
赤裸裸的淫秽作品是明令禁止的，但仍可私下买到。
[as modifier]an under-the-counter deal.
偷偷摸摸的非法买卖。
(英)run or ride against the direction taken by a quarry
往相反方向追猎；背道而驰