Keratomileusis
角膜磨削术
🗣️ 情景例句
Pardon me, what's the time by your watch?
对不起，你知道现在几点吗？
Prosperity gains (or makes) friends, and adversity tries them.
顺境交朋友，逆境试真情。
But instruments far more delicate than that were needed if any really serious advance was to be made.
但是，如果要取得真正重大的进展，需要有比这种装置精细得多的仪器。