PHONE SYSTEM
\fˈə͡ʊn sˈɪstəm], \fˈəʊn sˈɪstəm], \f_ˈəʊ_n s_ˈɪ_s_t_ə_m]\
Word of the day
Quinones
- Hydrocarbon rings which contain two moieties position. They can be substituted in any position except at the ketone groups.