再用熔点测定 、 光谱分析等鉴定两钩藤碱的特征.Spectral analysis, etc appraise the characteristic of two hook rattan alkali.目的: 为制订古钩藤质量标准提供依据.Objective : To supply basis for establishment of quality standard of Cryptolepis buchanaii.结果: 用薄层色谱...
有一小会儿他看上去有些迟疑不定,之后又恢复了镇定。For a minute he looked uncertain, and then recovered his composure.“你能帮我个忙吗?”她迟疑地问。"Would you do me a favour?" she asked hesitantly.她犹豫了一下,带着迟疑的微笑把手伸了出去。With some hesitation and an uncertain smil...