The police are working on the theory that she was attacked by somebody she knew. 请问专家:句子是什么意思?特别是句子中的 on the theory that 意思是“根据……理论”的意思吗?
There is a big hole the right door of the dance room. A at B on C by D in 这道题纠结在on 和in ,请老师指点,谢谢!
老师你好!decide,decide on(决定,选定)有区别吗?