In chinese, tangerine is 橘子，orange is 橙子， that's the difference~

Try to eat it , you will remember taste difference....

这些问题不用在这问。如果你使用"images.google.com"就立刻知道什么叫tangerine什么叫orange. 看片之后不容易忘记哦！ tangerine:橘子orange:橙子

Tangerine: A generic name given to numerous small orange citrus fruits, more commonly known as mandarins. Satsumas are simply a different variety and clementines are a hybrid between the tangerine and the sweet orange. Orange: The fruit of a tree of the genus citrus .It is usually round, and consists of pulpy carpels, commonly ten in number, enclosed in a leathery rind, which is easily separable, and is reddish yellow when ripe. There are numerous varieties of oranges; as, the bitter orange, which is supposed to be the original stock; the navel orange, which has the rudiment of a second orange embedded in the top of the fruit; the blood orange, with a reddish juice; and the horned orange, in which the carpels are partly separated..

I think the main difference is that tangerines are smaller, whereas oranges are bigger. Also tangerine skin is usually easier to remove.