He was a talented junior swimmer who became the youngest-ever US swimmer to set a swimming world record in the 200 meters Butterfly when he is only at the age of 15.是什么意思_He was a talented junior swimmer who became the youngest-ever US swimmer to set a swimming world record in the 200 meters Butterfly when he is only at the age of 15.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句