The fading reaction of DCB arsenazo with Cr 2 O 2 - 7 was studied.本文研究了DCB偶氮胂与Cr2O2-7的褪色反应.Cars were covered with clear-coat finish at the factory to protect the underlying paint from fading.工厂给汽车上了透明罩漆，以防底漆褪色。Hopes of a...
罗马的船只过去经常乘着潮汐从布洛涅航行到里奇伯勒。Roman vessels used to sail with the tide from Boulogne to Richborough.她想象潮汐涌来，淹没潮湿的沙滩。She thought of the tide rushing in, covering the wet sand.多泥的潮汐洼地散发出极为难闻的气味.The muddy tide flat smelled to hi...