back and forth
US /bæk ən fɔːrθ/
UK /bæk ən fɔːrθ/
1.
來回, 往返
moving first in one direction and then in the opposite direction repeatedly
:
•
The pendulum swung back and forth.
擺錘來回擺動。
•
They walked back and forth across the room.
他們來回走過房間。
2.
來回, 往返
between two points, people, or places
:
•
The ball went back and forth between the players.
球在球員之間來回傳遞。
•
They exchanged emails back and forth for days.
他們來回發送郵件好幾天。