double bass

Từ điển Việt Anh Việt 4in1 - English Vietnamese 4 in 1 Dictionary

double bass /ˌdʌbəl ˈbeɪs/ BrE AmE (also bass) noun [countable]
a very large musical instrument shaped like a ↑violin that the musician plays standing up

d\\double+basshu

double bass
The double bass is a very large string instrument.