In dr nersesian 's titration the litmus was a species called the brushtail possum .

涅尔谢相博士的滴定实验中的“石蕊指示剂”是一种叫帚尾袋貂的动物。

Titration , to remind those who dozed through their chemistry lessons , is a way of working out the concentration of a substance in a solution .

滴定法（为了给那些在化学课上打过瞌睡的同学们提个醒）是一种计算溶质在溶液中的浓度的方法。

And a group of researchers led by carolyn nersesian of the university of sydney has just borrowed one of chemistry 's most elegant techniques , titration , to answer a pressing ecological question : how do animals choose where to feed ?

最近由悉尼大学的卡洛琳涅尔谢相带领的一组研究人员借用化学里一种非常精妙的技术滴定法来解决一个迫待回答的问题：动物们如何选择觅食场所。