Graphics showing the tongue positions for pronunciation of Mandarin Chinese sounds that frequently are difficult for English speakers to produce. Produced by Patrick Edwin Moran.
No machine-readable author provided. <a href="//commons.wikimedia.org/wiki/User:Patrick_Edwin_Moran" title="User:Patrick Edwin Moran">Patrick Edwin Moran</a> assumed (based on copyright claims).
CC BY-SA 2.5
No machine-readable source provided. Own work assumed (based on copyright claims).