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Scanning thousands of native English clips with synchronized subtitles and exact timestamps.
Pronunciation Guide
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Listen to native speakers pronounce “freon” in real conversational contexts with synchronized timestamps and subtitles.
And so I was literally working on a new type of heat pump that would use water as a working fluid instead of freon,because freon was bad for the environment.And so I was going to invent this new environmentally friendly air conditioning system.