Annuloplasty
瓣环成形术
🗣️ 情景例句
I can't go another step because I'm pooped.
我一步也走不动了，我已经精疲力尽了。
After dinner sit a while; after supper walk a mile.
午餐之后坐片刻，晚饭之后走一里。
Even more processes are never patented at all but kept as secret processes.
更多的工艺过程根本就不会取得专利权，而是作为秘方保存着。