medium
单词辨析：
通常用于数量。
They have an average-sized backyard.
他们的后院中等大小。
She is in her early thirties and of average height.
她30岁出头，中等个儿。
指处于中间位置的或在一组数值中居中的。
a median point/price
中点/中等价位
The median age of that group is 36.
那组的中间年龄为36岁。
通常用于大小、水平、数量等。
medium depth/height
中等深度/身材
This cloth is of medium quality.
这种布质量平平。
The red cap is of a medium size.
那顶红色的帽子是中号的。
Fry the fish over a medium heat.
用中火炸这条鱼。
相关例句：
The magazine becomes a cultural medium of intercourse between the two peoples.
该杂志成为两民族间文化交流的媒介。
Blood is the medium in which oxygen is carried to all parts of the body
血液是将氧气输送到人体各个部位的媒介。
He used the medium of radio when he wanted to enlist public support or reassure the citizenry
他利用广播媒介来获得公众支持或安定民心。
He has a medium body.
他有一个中等的身材。
The store sells big ones, small ones, medium ones, or what have you.
那家商店卖大号的、小号的、中号的，应有尽有。
But Artaud was increasingly dissatisfied with film as a medium.
但是阿尔托对电影这种表现方式越来越不满。