• 低音

Lowig洛维格lowadj.低的；少的；低落的；低声的；卑劣的；低等的adv.低地；低声地；低下地；廉价地n.低水平；低价；低谷v.哞哞叫low birefringence低双折射low-sided wagon低边车low income family低收入家庭low pour point oi低倾点油low NO combustion低NOx燃烧Lowenthal's tract铁路勘察Low blood glucose低血糖low-level groin河底潜坝low profile valve低架(人工)瓣膜low-level logic低电平逻辑

1. The singer forced his low notes.
   那位歌手勉强唱出低音。
2. Long tones in the low register, with your best tone and keeping the sound at mezzo-forte level.
   低音区长音，用你能够达到的最好的音准，用中强力度。