例句 /

A compound was isolated from the leaves of Populus tomentosa for the first time andidentified as populin on the basis of spectral analysis.

A compound was isolated from the leaves of Populus tomentosa for the first time andidentified as populin on the basis of spectral analysis.

首次从毛白杨叶中提得一种白色结晶,经光谱分析等手段鉴定为白杨甙(populin)。