Carionecrosis
骨疽性坏死
🗣️ 情景例句
What does John do?
John现在做什么事？
He's a composer of popular songs.I like his music a lot.
他是流行歌曲作曲家，我很喜欢他的音乐。
Some really keen enthusiasts go so far as to build their own computers.
有些热衷于自己动手的人甚至自己组装电脑。