我看了一下里程计, 他说得没错,确实是4英里, 我还坚信是20英里呢.I checked the odometer . He was right. Four miles exactly. I could have sworn it was 20.他们驱车前进,里程计滴答滴答地把里程记录下来.The speedometer clicked off the mileage as they drove on.里程计用于测速和测距.Odomet...
用42℃热激诱导JM109 ( pBV220-cit ) 精氨酸脱亚氨基酶的表达,但是未检测到酶活.However, the ADI enzyme activity of JM 109 ( pBV 220 - cit ) had not been detected.结果二乙醇胺直接清洁氧化合成亚氨基二乙酸.Results Iminodiacetic acid was synthesized cleanly from diethanola...