Cartilage is formed from glucosamine and chondroitin sulphates in the body.软骨是由身体里的葡萄糖胺和软骨素构成的.PurposeTo extract and purify chondroitin sulfate ( chs ) from pig cartilage.目的从猪鼻软骨中提纯硫酸 软骨素.The company is in Shandong Provi...
他们站立不稳，协调性较差。They were unsteady on their feet and rather uncoordinated.双腿适度分开站立，双膝稍稍弯曲。Take a comfortably wide stance and flex your knees a little.服务员笔直站立着，餐巾折叠着放在他们的手臂上。The waiters stood to attention with napkins folded...