请问stand at the door 和stand by the chalkboard,为什么用at和by呢?两者有什

请问stand at the door 和stand by the chalkboard,为什么用at和by呢?两者有什 at the door和by the door有什么区别 stand at table 和stand at the table 的区别 站在窗边是stand at the window还是stand by the window stand at the table stand ____ the subway door[in/to/at/on/] I saw you stand(ing) at the door. by a passing plane,和by a knock at the door the house 【】【stand】at the. stand in和stand at的区别 stand in the door Always keep the faith Stand by TVXQ