4. fall [drop] behind 落在后面。如(from www.zkenglish.com):
I’ve fallen behind in work. 我工作落后了。
Some students dropped behind in their studies. 有的学生在学习上落在后面。
4. fall [drop] behind 落在后面。如(from www.zkenglish.com):
I’ve fallen behind in work. 我工作落后了。
Some students dropped behind in their studies. 有的学生在学习上落在后面。