例句與造句

1. By 1923 his lab was working on accelerators for manufacture of synthetic rubber and soon after extended the research to include antioxidants for gasoline and rubber, floatation agents, insecticides, seed disinfectants, and large scale manufacture of tetraethyllead.
2. It's difficult to find seed disinfectant in a sentence. 用seed disinfectant造句挺難的