这种特殊形态的维生素D天然存在于母乳中。This special form of vitamin D is naturally present in breast milk.母乳喂养有许多益处。There are many advantages to breast-feeding.主流科学家宣称母乳喂养的婴儿更聪明。Leading scientists claim breast-fed babies are intellectually...
The programmer forms the heart of the process chromatograph.程序控制器是色谱仪的关键部件.The basic principle of vacuum braze and its application in manufacturing gas chromatograph are described.介绍了真空钎焊技术的基本原理及其在气相色谱仪气路部件加工中的应用.The tec...
The so - called faience is porcelain other than celadon and white porcelain, including the blue and white.所谓彩瓷,是指青瓷、白瓷以外的瓷器, 包括青花瓷(porcelain).Celadon widely the favor of collectors and enthusiasts and collection.广为青瓷爱好者及...