back and forth
US /bæk ən fɔːrθ/
UK /bæk ən fɔːrθ/

1.
maju mundur, bolak-balik
moving first in one direction and then in the opposite direction repeatedly
:
•
The pendulum swung back and forth.
Bandul berayun maju mundur.
•
They walked back and forth across the room.
Mereka berjalan maju mundur melintasi ruangan.
2.
bolak-balik, antara dua titik
between two points, people, or places
:
•
The ball went back and forth between the players.
Bola bergerak bolak-balik di antara para pemain.
•
They exchanged emails back and forth for days.
Mereka bertukar email bolak-balik selama berhari-hari.