it turns low frequency waves into high frequency waves これで低周波を高周波に変えて
they'll happen , but very low frequency . 衝突は起きたとしても 極めて低い頻度です
could be an extremely low frequency . 低周波かも
it turns low frequency waves into high frequency waves so that we can hear them . これで低周波を高周波に変えて 耳で聞こえるようにしているの
as the line was used at a low frequency due to the nature of ko-shu railway transport , sabitori-ressha operated between oji and the otori stations . 甲種輸送の性格上、路線の使用頻度は低かったが、線路保守のために錆取り列車が王寺 - 鳳駅間で運転されていた。