Maybe you fall asleep in class because of uncorrected astigmatism.也许你在课堂上睡觉是因为你的眼睛散光.They have what is called astigmatism.他们有所谓散光.Under astigmatism even narrow parallel light beams will not combine into one point.有象散存在时甚...
Astigmatism can occur in addition to nearsightedness and farsightedness.散光可发生在除近视和远视.Maybe you fall asleep in class because of uncorrected astigmatism.也许你在课堂上睡觉是因为你的眼睛散光.They have what is called astigmatism.他们有所谓散光.Anast...
The company is sending out leaflets to all its contacts.公司将把传单发送给所有的有关单位.There are frequent contacts between the peoples of the two countries.两国人民之间交往频繁.Our factory has frequent contacts with the neighbouring villages.我们...