- 重点词汇
- 唇齿相依
be as close as lips and teeth—be closely related and mutually dependent; be closely related and interdependent as lips and teeth
Crossword puzzles are as close as lips and teeth.
Crossword puzzles are as close as lips and teeth.
be as close as lips and teeth—be closely related and mutually dependent; be closely related and interdependent as lips and teeth