P. d.
[医] 棱镜屈光度, 乳头直径, 瞳孔间距离
🗣️ 情景例句
I like Ellen.
我喜欢Ellen。
It is an evil sign too see a fox lick a lamb.
狐狸舔羔羊，这是凶迹象。
Radio and television have made it possible for advertisers to capture the attention of millions of people in this way.
电台、电视使做广告的人可以用这种手段吸引成百万人的注意力。