Some communicable diseases are transmitted only through the agency of insects.某些传染病只通过昆虫来传播.Some communicable diseases are transmitted only through the agency of vermin or insects.某些传染病只通过害虫和昆虫来传播.Communicable diseases h...
用防风雨的帆布背包装照相机和镜头。Use a weatherproof rucksack to carry your camera and lenses around in.她小心翼翼地在红帆布垫上坐下，膝盖矜持地并拢着。She sat down cautiously on the red canvas cushions, knees modestly together.主帆是用真正的厚篷帆布手工裁剪和缝纫而成的。The mainsai...