Measles, mumps and whooping cough are spreading again because children are not being vaccinated.因为孩子们没接种疫苗，麻疹、腮腺炎和百日咳又蔓延开来。Whooping cough is a serious respiratory disease caused by Bordetella pertussis.百日咳是一种由百日咳杆菌引起的严重的...
Whooping cough is very prevalent just now.百日咳正在广泛流行.Measles, mumps and whooping cough are spreading again because children are not being vaccinated.因为孩子们没接种疫苗，麻疹、腮腺炎和百日咳又蔓延开来。Have you had your child vaccinated against wh...
He could feel the beads digging into his palm.他能感觉到珠子硌得手心生疼。The long string of Qing Dynasty beads is one our families heirlooms.这串朝珠是我家的传家之宝.Button shaped beads pendant , Earing, a meson, welcome to order!异型纽扣珠吊坠,耳钉, 介子一...
将金属压进钢型中以使金属成型的过程.A forming process that presses metal into or through cold drawn wire.金属底版有铅空排版 、 浇铅版、钢型刻版 、 钢板刻版等多种.Metal bottom slab has empty interpuntion, cast - in - print of a type of block , steel , steel block....