Even the smallest daily activity, like brushing one's teeth, requires a trip to the tank, where people pay a large portion of their meager salaries for containers of cloudy,brackish water.

VOA: standard.2010.08.04

Some small subsets do but most of the cells in your brain don't proliferate and that's because they get trapped at one portion of the cell cycle.

除了很小一部分以外大部分脑细胞不增殖,这是因为,它们停滞于细胞周期的某个阶段

耶鲁公开课 - 生物医学工程探索课程节选

And this one will be particularly germane to a portion of Problem Set 1, at least in Problem Set 1.

这个程序跟习题集1中的,一部分比较相似，至少在习题1中。

哈佛公开课 - 计算机科学课程节选

This particular one down here, this portion here is a heart/lung machine and this is a machine that can take over the function of a patient's heart and lungs during the period when they're undergoing open heart surgery, for example.

下面这是一个特别的设备,这一块是,心肺机,这台机器能够,在病人接受心脏手术的时候,替代病人的,心脏和肺的功能

耶鲁公开课 - 生物医学工程探索课程节选

One problem that people have is understanding what a portion is, because you say we should have this many servings of fruits and vegetables a day, we should have this many servings of that a day.

人类很难理解每餐食物摄入量这概念,因为假设,我们一天应该摄入一定份量的水果和蔬菜,各种食物每天都有一定摄入量

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选