它由一对同轴的圆筒组成.It consists of a pair of concentric cylinder.样品光谱是通过将小型管固定器与纤维之间同轴的方式获得的.The sample spectra were obtained with the cuvette holder in - line between the fibers....
By the age of two most children have begun to communicate verbally.大多数孩子两岁时就开始用说话沟通.By the age of sixteen he was the junior lightweight champion of Poland.16岁时他已经是波兰的青少年组轻量级冠军。By the age of seven he could write beautiful...