amerikai:
brit:
1. To happen or take place.
The liftoff will occur in exactly twelve seconds.
2. To present or offer itself.
I will write if the opportunity occurs.
3. To come or be presented to the mind; to suggest itself.
4. To be present or found.
The chemical monofluoroacetate occurs in all parts of Dichapetalum cymosum, and is responsible for its toxic effects.