step by step exchange

基本解釋

It is main method for STEP to implement product data exchange by database exchange.
數據庫交換方式是STEP實現產品數據交換的主要方式。
The results showed that boron separation by the two-step ion exchange for isotopic measurement was more effective. It achieved high accuracy of isotopic measurement of boron.
采用二次離子交換法分離天然樣品中的硼是一種更有效的從天然樣品中分離和純化硼的分離方法，因而，也進一步提高了硼同位素組成測定的測量精度。
In recent years, with the expansion of China foreign economic cooperation exchange step by step, the environment questions have been brought more and more attention to academic circles.
近年來，隨著中國對外經濟合作交流的逐步擴大，環(huán)境問題已越來越引起學術界的廣泛注意，環(huán)保也成為“兩會”的熱點話題。