大部分被安置在地板水平，使其容易到达的维修，服务和清洁。
Most parts are placed at floor level to make it easy to reach for maintenance, service and cleaning.
他们虽然都有高薪工作，但仍在晚上和周末的时间做清洁工作，而这正是他们的服务需求量最大的时候。
Although they are both gainfully employed, they did cleaning jobs into their nights and weekends which is when their service is in most demand anyway.
她说，大自然提供的物质与服务，比如清洁空气、雨水和肥沃的土壤，不应被认为是当然的存在。
She says that the goods and services provided by nature - like clean air, rain or fertile soils - should not be taken for granted.
应用推荐