雨声

faint sound───微弱的声音

optical sounds───光学声音

rain clouds───[气象]雨云

rainfalls───n.降雨；降雨量

football grounds───足球场

training grounds───训练场地

Ibizan hounds───依比沙猎犬

burial mounds───古坟

gazelle hounds───瞪羚猎犬

Many noise machines also have the option of playing soothing sounds, such as ocean waves or rainfall.───很多噪音隔离器还能选择制造出温和的声音，比如海浪或者雨声。