英语翻译用分光光度法对不同时期紫叶李和普通绿叶李叶片中叶绿素、类胡萝卜素和花青素的含量进行测定分析,系统观察和记载两种树木的叶色变化.结果表明：在3月到7月,紫叶李叶片中叶绿素、类胡萝卜素和花青素含量总体上均呈上升的趋势,叶绿素a和b含量的变化趋势与叶绿素总量的变化趋势相似,三种色素的综合作用使紫叶李叶色越来越深；紫叶李叶色与三种色素的变化呈正相关关系；绿叶李叶色与叶绿素/类胡萝卜素呈正相关关系,对绿叶李的叶色变化起主要作用的是叶绿素和类胡萝卜素,绿叶李叶片中花青素含量的变化不显著,它对叶色变化的影响有限.

Spectrophotometric method with different time of purple YeLi and ordinary green YeLi leaf in the chlorophyll, carotenoids and the content of anthocyanins were analysis, system observation and recorded two trees leaves change color. The results show that in March to July, the purple YeLi leaf in the chlorophyll, carotenoids and the anthocyanins in general are rising in the trend, the content of chlorophyll a and b changing trends and chlorophyll the change trend of total similar, three types of pigment comprehensive action to make YeLi purple leaf color more and more deep; Purple YeLi leaf color and three types of pigment changes are positively related; Green YeLi leaf color and chlorophyll/carotenoids are positively related, to the green leaf color change of YeLi plays a main role is of chlorophyll and carotenoids, green YeLi anthocyanins in the leaves of the change of the content is not significant, it leaves change color to limited impact.

Spectrophotometry was used to analyze the contents of 3 pigments (chlorophyll, carotenoids, and anthocyanins) in the leaves of purple-leafed plum trees(Prunus ceraifera cv. Pissardii; alias: myrobalan plum) and green-leafed plum trees. Results showed that, from March to July months, the 3 pigments in the purple-leaved plum trees increased over time. The increase patterns of chlorophylls a and b were similar to that of the total chlorophyll level. The increase of the 3 pigments darkened the color of the purple-leafed plum trees; the leaf color density positively correlated with the contents of the 3 pigments. For green-leafed plum trees, the levels of chlorophylls and carotenoids were primarily responsible for the leaf color, and positively correlated with the leaf color. Whereas the anthocyanins level did not change significantly in that time period in green-leafed plum trees; thus it had a limited effect on their leaf color.

Using spectrophotometry purple leaf plum and ordinary green leaves at different stages on leaf chlorophyll, carotenoids and anthocyanins in Lee's determination for the content analysis, systematic observation and recorded two trees leaf color change. Results indicates that: in March to July, purple leaves Lee leaves in the chlorophyll, and class carotene and anthocyanin content overall Shang are is

翻译：由四个独立的IL2901精密电压比较器和一个偏移电压规格低至2.0 mV最多可容纳四个比较器是专门设计用来从一个单电源供电的操作范围内的电压。应用范围

To test and analyze the chlorophyll,carotinoid and anthocyanin contents of leaves from prunus cerasifera （或purple - leafed plum）in different periods and ordinary green-leafed plum with spectrophoto...