keratectomy的复数形式怎么拼写

keratectomy的音标：keratectomy的英式发音音标为：[ˌkerə'tektəmɪ]keratectomy的美式发音音标为：[ˌkerə'tektəmɪ]...

n.角膜切除术...

Objective To observe the effect of full thickness lamellar keratoplasty combined with PTK ( photo therapeutic keratectomy ) .目的探讨联合 PTK 的全厚植片深板层角膜移植术的疗效....