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...
我们看到3只鸟在高空盘旋。We saw three birds circling very high up.秃鹰在高空翱翔。Buzzards soar overhead at a great height.我们能看到在高空中飞的飞机.We can see a plane flying in the clouds....
Three large globes stand on the floor.3个巨大的地球仪立在地板上。Light bar with glass globes. Number of globes can be specified.带多个玻璃球形灯的灯柱. 可指定灯的数目.The total amount of pollen was measured more accurately by 30 millimetre deameter gl...