But Marc Tucker says students who pass the exams could stay in high school and take a demanding set of exams at the upper division level.

VOA: special.2010.02.25

And instead of having the electron giving off energy as a photon, instead now the electron is going to take in energy from light and move up to that higher level.

与电子以光子形式施放能量不同,我们现在要从光中,获得能量到一个更高的能级。

麻省理工公开课 - 化学原理课程节选

And what we predict as an energy difference between two levels, we know should correspond to the energy of light that's either emitted, if we're giving off a photon, or that's absorbed if we're going to take on a photon and jump from a lower to a higher energy level.

我们预测，两个能级之间的能量差，我们知道，它要么和发出的光有关,如果它发出光子的话，要么它吸收光子,从低能级跃迁到，更高能级上去。

麻省理工公开课 - 化学原理课程节选

Mr.Zuma said the two countries wished to take their relationship to a higher level.

VOA: standard.2009.08.08

Secretary of State Hillary Clinton says there are no formal meetings planned, but she left open the possibility that she and President Barack Obama might interact with Burmese Prime Minister Thein Sein or other officials when they take part in a U.S.-ASEAN summit-level dialogue Sunday in Singapore.

VOA: standard.2009.11.12