Preventers are usually brown, red or orange inhalers.这些预防类药物通常是褐色, 红色或者橙色的.How can we improve engines, inhalers, and extinguishers?我们怎样改进引擎 、 喷雾器和灭火器?...
The surface corrosion was worst where the paint had flaked off.油漆剥落的地方表面腐蚀最为严重。All planes are being inspected for possible cracking and corrosion.所有的飞机都在接受检查，看是否可能有裂纹和腐蚀现象。Corrosion is not covered by the warranty.腐蚀不在保修范...