She wrote to one of her friends about her dream of one day owning a house with an art collection like the one she had seen in Italy.

VOA: special.2009.01.11

There's no one person owning them, so they both have two electrons here that are bonding.

这里没有人欠对方，因此它们都有两个成键的电子。

麻省理工公开课 - 化学原理课程节选

There's no one person owning them, so they both have two electrons here that are bonding.

这里没有人欠对方，因此它们都有两个成键的电子。

麻省理工公开课 - 化学原理课程节选