The youngest child, John, was to die at the age of fourteen.最小的孩子约翰后来于14岁时夭亡。Kasparov became the youngest world title-holder at 22.卡斯帕罗夫22岁时成为最年轻的世界冠军。Her youngest child is at nursery now.她最小的孩子现在上托儿所。...
Lysozyme is an enzyme found in egg white, tears, and other secretions.溶菌酶是存在于卵白 、 泪和其他分泌物中的一种酶.Chest percussion and vibration are used with postural drainage to help dislodge secretions.在做体位引流时要敲击和振动胸部帮助分泌物松动排出.Surfactan...