A key aspect of transformations is that they enable you to crosslevels of abstraction.
转换的一个关键方面是，它们能使您进行各种层级的抽象。
2
Now when you look at uranium cross section as a function of energy and that's this neutron energy from EVs to MEV levels.
现在，当你看铀的横截面，是以能量的函数，那是中子能量，从电子伏到兆电子伏水平。
3
In Kenya, for example, at current economic growth rates and with the present levels of income inequality, the median family in poverty would not cross the poverty line until 2030.