I assume that you know nothing, starting from ground zero here and build it up.

我假设你们什么都不知道,零起点,从头开始

耶鲁公开课 - 聆听音乐课程节选

Well, the energy at infinity is zero -K and the energy in the ground state is minus K.

无限远处的能量值为,而基态能量值为。

麻省理工公开课 - 固态化学导论课程节选