dirt bike
US /ˈdɜːrt baɪk/
UK /ˈdɜːrt baɪk/

1.
moto de cross, moto de tierra
a lightweight motorcycle designed for use on rough terrain, often in races or for recreation
:
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He loves riding his dirt bike through the trails.
Le encanta montar su moto de cross por los senderos.
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They bought a new dirt bike for their son's birthday.
Compraron una nueva moto de cross para el cumpleaños de su hijo.