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...
Dense smoke swirled and billowed, its rank fumes choking her.滚滚浓烟盘旋翻腾，恶臭味呛得她喘不过气来。Steam billowed out from under the bonnet.引擎盖下喷出滚滚的蒸汽。Thick black smoke billowed over the scene.在这一场景中浓浓的黑烟滚滚升起。...