Kolintogba

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► 名詞
音速  [おんそく]    meaning:  speed  rank: 4
☆ 音速は時速約1200キロだ ⇨ The speed of sound is about 1,200 km/h


More examples:

• 音速は秒速約340メートルだ ⇨ The speed of sound is about 340 meters per second