比色法涉及氟离子对预先形成的颜色的消色作用.The colorimetric methods involve the bleaching of a preformed color by the fluoride ion.用香草醛-冰醋酸比色法测定西洋参中总皂甙的含量.The content of ginsenoside in Panax quinquefolium L was determined by colorimetry.方法: ...
这个城市反抗敌人的猛攻达两个星期之久.The city resisted the enemy onslaught for two weeks.部队猛攻敌人的战壕,并在田野上呈扇形散开.The troops stormed the enemy's trenches and fanned out across the fields.敌人在西线发动猛攻.The enemy made a push on the western fro...
Ah Duo bit his lips to keep from laughing aloud.阿多咬住了嘴唇暗笑.the comedy duo Laurel and Hardy劳莱和哈代这对喜剧搭档The duo cut rectangular holes in balsa wood and covered them with glass microscope slides.两人在轻质木材上剜出一些长方形的洞,然后在洞口盖上显微镜玻片...
Now it is clearing up, and a sparrow is beginning to chirp.现在天就要晴了, 一只麻雀已开始喳喳地叫.The birds chirp merrily at the top of tree.鸟儿在枝头欢快地啾啾鸣唱.Only male cicadas chirp in late summer, and early autumn.只有雄性的寒蝉在夏末秋初时鸣叫.Birds had b...