To investigate the allergen distribution and characteristic in hypersensitive children.了解儿童变态反应性疾病患者过敏原分布情况及特点.When the immune system encounters an allergen , it may become sensitised.当免疫系统发现了过敏原就会致敏.Long - term exposure...
Emma dismounted and took her horse's bridle.埃玛下了马，拉着马笼头。It is the bridle and spur that makes a good horse.要把马练好,缰绳靴刺不可少.He was leading a horse by the bridle.他牵着马的缰绳....
( Permitting a call while other data is being accessed is a preferable alternative. )通话结束后,要能够返回到以前的模式 ( 在访问其他数据时,仍然可以允许电话进来则是更好的一种可选方案 ).Antimonial lead is preferable to chemical lead because of its greater corrosion re...