她胆怯地走到坐在桌边的女士面前, 手里紧紧握着毕业证和鉴定书.Nervously she approached the lady at the desk, holding her certificate and testimonials very tight.鉴定书无主检、审核、批准签字无效.The certification is invalid without the signature of appraiser , checker...
Pouches are a peculiarity of marsupials.腹袋是有袋动物的特色.He had a long lugubrious face with drooping jowls and soft pouches beneath the eyes.他有着阴沉的长脸,下垂的下颚,眼睛下面的眼袋松泡泡的.Under my eyes the pouches were heavy.我眼睛下的眼袋很深。There were ...
这些参数导致了特定固定相的分离行为.These parameters contribute to the chromatographic behaviour of a particular stationary phase.方法使用薄层色谱法, 以硅胶 GF254 为固定相.Methods: TLC method was applied , the stationary phase was GF _ ( 254 ).考察了一些手性化合物...