lag behind
US /læɡ bɪˈhaɪnd/
UK /læɡ bɪˈhaɪnd/

1.
tertinggal di belakang, ketinggalan
to make slower progress than others
:
•
The company is lagging behind its competitors in innovation.
Syarikat itu tertinggal di belakang pesaingnya dalam inovasi.
•
He always lags behind the rest of the group during hikes.
Dia sentiasa tertinggal di belakang ahli kumpulan yang lain semasa mendaki.