二级: two stage; two level; second ...生火: make a fire; light a fire大学二级生: sophomore第二级生产: nbsp; sea transport; secondary production次级生产；第二级生产: secondary production第二级生产；次级生产: secondary production; secondaryproduction二级生物滤池: two stage biofilter第二级生产；第二产业: secondary production废水的二级生物处理: secondary biological treatment二级: two stage; two level; second level; secondary; second 这船列入二级。the ship rates as second木生火: wood-fire impairs metal生火，弄火: make a fire生火长: chief fireman; chief stoker生火的: fireman's生火工: fireman; stoker生火间: stoke hold (or fire room); stokehole留级生: to repeat a year跳级生: accelerated student同级生: contemporary; dōkyūsei无级生: maxam下级生: kakyuusei初级生产；第一级生产: primary production第一级生产；初级生产: primary production; primaryproduction产生火花: spark发生火花: flash
