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How to pronounce "b12"

Matches found: 2 (8 ms)
1.
of vitamin B12.

ted-talks_1190_TimHarford_2011G-320k

Duration: 3s   Details
2.
supplies of vitamin B12 are delivered to the camp,

ted-talks_1190_TimHarford_2011G-320k

Duration: 4s   Details