例句與造句

1. This paper introduced variable refrigerant flow multi split air conditioning systems ' s principle and features , it has expressed my views combined with my experience to the problems when designed engineering
   摘要本文介紹了變制冷劑流量空調(diào)系統(tǒng)的特點及在設計中應該注意的問題。
2. It's difficult to find split air conditioning system in a sentence. 用split air conditioning system造句挺難的