back and forth
US /bæk ən fɔːrθ/
UK /bæk ən fɔːrθ/
副词
1.
来回, 往返
moving first in one direction and then in the opposite direction repeatedly
示例:
•
The pendulum swung back and forth.
摆锤来回摆动。
•
They walked back and forth across the room.
他们来回走过房间。
2.
来回, 往返
between two points, people, or places
示例:
•
The ball went back and forth between the players.
球在球员之间来回传递。
•
They exchanged emails back and forth for days.
他们来回发送邮件好几天。
在 Lingoland 学习这个单词