at one's convenience

基本解释

At least one reasonbehind the success of Tesco's convenience stores is public transport.
至少乐购便利店成功的一个背景因素是公共交通。
At one time give convenience of operator and depress due to equipment's drainage shatter be at the bottom of losing.
同时给运行值班员操作带来方便和降低因再生设备损坏时所引起的损失。
The convenience store is one kind of commercial retail trade which the 20th century 70's appear, at present and so on the developed country already was mature in America and Japan.
便利店是20世纪70年代出现的一种商业零售业，目前在美日等发达国家已经成熟。