常見例句雙語例句The gradient elution is reasonable when the retention time is 2.3 times after the appearance of prominent peak with initial mobile phase acetonitrile-water(40:60).用初始流動相乙腈-水（40：60）洗脫至主峰出峰保留時間的2.3倍時開始進(jìn)行梯度洗脫比較合理。The effects of applied voltage, retention time and initial concentration on decomposition efficiency were studied and the decomposition products of ammonia were analyzed.研究了施加電壓、停留時間、初始濃度對臭味氣體分解率的影響 ，并對氨的分解產(chǎn)物進(jìn)行了初步分析。Based on the material and process requirements of dynamic water grouting engineering, slurry retention rate with different water velocities and the pumpability after initial setting time are tested.基于現(xiàn)場動水注漿治理的材料與工藝要求，測定材料在不同水流速中漿體留存率與可泵性；202.127.156.16 返回 initial retention time