P friendly exchanges 友好往来
Our teachers are very kind and friendly. At school we learn many subjects such as Chinese, math, English, music, P. E. and so on. They are very interesting.
我们的老师很和蔼、很友好。在学校我们要学很多科目,如:语文、数学、英语、音乐、体育等等,它们都非常有意思。
We would like to pay sincere friends Quartet P Plus friendly, County jointly develop the rich treasure of the earth.
我们愿诚交四方宾朋、八方友好,共同开发文县大地的丰富宝藏。
BL-environmental friendly flame retardant belongs to N-P flame retardant series, and its main raw materials are phosphoric acid and urea the same as ammonium polyphosphate (APP).
BL -环保阻燃剂属于N - P系阻燃剂,其主要原料与聚磷酸铵一样是磷酸与尿素,但因为其特殊的合成工艺使它不同于普通的聚磷酸铵。
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