to lag behind
[phrase form: lag]
01
落后, 进展缓慢
to develop or progress more slowly than someone or something else
例子
American companies are lagging behind their Chinese counterparts in the development of artificial intelligence.
美国公司在人工智能的发展上落后于他们的中国同行。
The student is lagging behind in his studies and needs extra help.
这个学生在学业上落后了，需要额外的帮助。
