half and half 什么意思?

half and half 什么意思? three and a half years什么意思 half-carrying什么意思 half什么意思 什么是“half and half” half an hour? 什么意思? half a million什么意思 half-sad look什么意思? half open fields and half half half an hour ago 什么意思? A goodbeginning is half done什么意思