Teacher: Why are you late, Frank?
老师: Frank, 说为什么你迟到了.

Frank : Because of the sign.
Frank: 因为,,因为那个标志.

Teacher: What sign?
老师: 神马标志??

Frank : The one that says “School Ahead, Go Slow”.
Frank: 那个写着,前方是学校, "慢行"的标志...