It's a state function, so we're at constant temperature and pressure, and now we want to consider some chemical change or a phase transition or you name it.

这就是态函数，我们处于恒定的温度和压强之下，然后考虑某些化学变化或者相变,或者你想考虑的东西。

麻省理工公开课 - 热力学与动力学课程节选

So, that's going to be important later when we get to bonding, but just take note of it now, we have two nodes, or we have two lobes, excuse me, each with a separate phase.

这等到我们之后讲到成键时是非常重要的，现在先要记住，我们有两个节点，不好意思，是两个叶瓣，每个都是不同的相位。

麻省理工公开课 - 化学原理课程节选

See, up until now I have been talking about gas phase, single atoms, all this stuff.

看，只到现在我们已经讨论了气相，单原子，这些东西。

麻省理工公开课 - 固态化学导论课程节选

Right now we're in a prototype phase.

现在我们还在样本阶段。

麻省理工公开课 - 媒体、教育、市场课程节选