Meaning of äänivalli | Babel Free
/ˈæːniˌʋɑlːi/Määritelmät
sound barrier
Vastineet
English
sound barrier
CEFR-taso
B2
Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.
This word is part of the CEFR B2 vocabulary — upper intermediate level.