um, in one language and then go to another language you have to talk on the level of a child.

再转换到另一门陌生的语言将是十分困难的，他的表达可能变得像儿童一样磕磕巴巴。

想学好英语吗？ - SpeakingMax英语口语达人

They're not going to want to add on another electron, because then it'll have to jump a very large energy level go from n equals 2, to n equals 3, and n equals 4, and so on.

它们不愿意增加另外一个电子，因为这会让它们跳到一个非常高的能级上去,依次是，n，等于，2，3，4，等等。

麻省理工公开课 - 化学原理课程节选