我要吸取前人的经验，了解自己以及手中的货物，这样才能成倍地增加销量。
I will increase my knowledge of mankind, myself, and the goods I sell, thus my sales will multiply.
我要吸取前人的经验，了解自几以及手中的货物，这样才能成倍地增加销量。
I will increase my knowledge of mankind, myself, and the goods I sell, thus my sales will multiply.
吸取前人在室内声学设计方面的经验，掌握室内声学设计的一般原则和方法。
Absorbing the experience the predecessors have got on the indoor acoustics design, master the general principle and methods of indoor acoustics design.
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