N If the machine were in good conditions, we would have used it in our last experiment.
n要是这台机器情况良好，我们上次就将它用于试验了。
Thermal model experiment of catalyst synthesis shows the shape of the N-catalyst can be controlled by using the above optimized agitation in a certain range of rotating speed.
催化剂合成热模实验表明，采用以上的搅拌形式，在一定的搅拌转速范围内，可以较好地控制催化剂的颗粒形态。
To investigate the changes of soil hydrolase activities under application of corn straws with manure, N and P fertilizer, a field experiment was conducted.
通过田间试验，进行了玉米秸秆与厩肥、N肥和P肥配合施入农田后土壤中水解类酶活性变化的研究。
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