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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 “sparker” in real conversational contexts with synchronized timestamps and subtitles.
in that top layer of surface tension.So, a sparker inside the chamber ignites the gas, and the explosion breaks the surface tension and shoots the robot 30 centimeters into the air.And once it's free, this robot can fly.