森林防火是你们的责任.Prevention of forest fires is up to you.为防止这种危险, 官员们采取各种细致的防火措施.To guard against this hazard, officials enforced elaborate fire precautions."再者, 卫生和防火法规经常通过刑事程序得到执行.Moreover, health and fire codes are frequent...
Volatiles should not be added to the epoxies to improve their viscosity.不应将挥发物加到环氧树脂中去改善它们的粘性.The viscosity shows a rather pronounced variation with temperature.温度对粘度的影响十分明显.Viscosity overwhelms the smallest eddies and c...