fall behind

动词 fall behind:

1. retreat
   同义词：fall back, lose, drop off, recede
2. hang (back) or fall (behind) in movement, progress, development, etc.
   同义词：lag, dawdle, fall back

1. The major world powers are afraid of falling behind in the arms race.
   世界各大强国均惟恐在军备竞赛中落後。
2. France has fallen behind (Germany) in coal production.
   法国在产煤方面落後(於德国)了。
3. I've fallen behind with my correspondence.
   我积压了许多信没回。
4. Don't fall behind with the rent, or you'll be evicted.
   不要逾期不缴房租，否则会被逐出。