The verb 来
The basic meaning of 来 (lái) is to come. In addition to this basic meaning 来 can be used in a range of different ways depending on the context.
When ordering food it can mean to bring:
再来一瓶啤酒! (Zài lái yī píng píjiǔ!) Please bring me another bottle of beer!
When shopping it can mean 'to give':
来一斤香蕉。 (Lái yī jīn xiāngjiāo) (Please) give me a pound of bananas.
It can also mean to do or it is somebody's turn:
让我来。 (Ràng wǒ lái.) 'Let me do it.'