be behind 延迟.落后 ●be behind in/with拖欠；拖延；不能如期完 成 She is behind with her term papers. ●fall behind落在.的后面，拖欠 ●fall behind in在.方面落后be behind 延迟, 落后 ⚫ be behind in / with拖欠; 拖延;不能如期完 成 ⚫ She is behind with her term papers. ⚫ fall behind 落在...的后面, 拖欠 ⚫ fall behind in 在...方面落后