in1.比如在某个地方:in Shanghai(大地方)2.在某种科目:in English3.在什么里面:in the box4.在某段时间:in the morning5.在某方面做得好:do well in mathin time及时on1.在什么的上面:on the desk2.在具体的...
in1.比如在某个地方:in Shanghai(大地方)2.在某种科目:in English3.在什么里面:in the box4.在某段时间:in the morning5.在某方面做得好:do well in mathin time及时on1.在什么的上面:on the desk2.在具体的...