The US market for headphones this past year was $2 billion, up 79% from last year, according to NPD.

据美国市场研究公司NPD报告，去年，美国耳机市场的规模是20亿美元，比前一年增加了79%。

youdao

The US market for headphones this past year was $2 billion, up 79% from last year, according to NPD.

据美国市场研究公司NPD报告，去年，美国耳机市场的规模是20亿美元，比前一年增加了79%。

youdao