双射

Traditional form:

雙射

Pinyin (reading):

shuāngshè

Definitions:

• (math.) bijection

Characters:

• 双 - pair, couple; both; measure word for things that come in pairs
• 射 - to shoot, to eject, to emit

Traditional characters:

• 雙 - pair, couple; both; measure word for things that come in pairs
• 射 - to shoot, to eject, to emit