intake:
1 the amount of food, drink, etc. that you take into your body. （食物,饮料等的）摄取量,吸取量
2 the number of people who are allowed to enter a school, college, profession, etc. during a particular period （一定时期内）纳入的人数
在“纳入”这个笼统的意思的基础上,intake指的是纳入的“量”,而不是纳入物,可以从两个英解看出来,都是the amount ,the number
absorption:
1 the process of a liquid, gas or other substance being taken in （液体,气体的吸收）
2 the process of a smaller group, country, etc. becoming part of a larger group or country 并入,同化
在“纳入”这个意思的基础上, absoption 强调的是“过程”,说的是吸纳的动作,而不是吸纳本身,英解中都是the process
