adj.第一等的

n.第一等

The fact of firstrate importance is the predominant role that custom plays in experience and belief, and the very great varieties it may manifest. 传统习俗最为重要的事实是其在个体经历和信仰中起到的主导作用，以及其可能表现出来的极富多样的特性。

The company takes that"honesty and truxtworthiness"is purpose,"understands land under heaven"as target,is innovative ceaselessly,with firstrate product,fine credit gives here and overseas travellling. 公司以＂诚实守信＂为宗旨，＂通达天下＂为目标，不断的创新，以一流的产品，良好的信誉竭诚欢迎海内外的客商洽谈业务，携手并进

Keywords diammonium phosphate （DAP）;firstrate product;compounding slurry method; 磷酸二铵;一等品;配浆法;