There is a backlog of repairs and maintenance in schools.对各学校的修缮和维护工作积压了一堆。Investment is needed to reduce the backlog of repairs.需要投资来減轻积压的维修工作.A huge backlog of work had built up.一大堆工作积压了起来....
There is a backlog of repairs and maintenance in schools.对各学校的修缮和维护工作积压了一堆。We are faced with a backlog of orders we can’t deal with.我们面对一大堆未交付的订单。(在英国指担心订货积压不易脱手，又“无奈”意；在美国指生意兴隆，有“踌躇满志”意)Investment is needed to reduce th...
Aquifers have water contents over 30 %.含水层的水含过30%.Untrammelled industrialisation, particularly in poor countries, is contaminating rivers and aquifers.不节制的工业化, 尤其是在穷国, 正在污染河流和地下含水层们.There are three types of aquifers: per...