单词	底反响
释义	底反响医Bottom Echo
随便看	second scale step second scale-step second scatter second scattering second school Second School of Clinical Medicine Second school year first semester Second school year second semester second scion seconds command second-score seconds countdown timer-set secondscounter seconds counter seconds-counter Seconds count in an emergency second screen second-screen second screening second scutching Seconds data second season second-season Second-season rice second secondary harmonic