He told them it is critical to continue the effort to transfer skills and tools to Afghans so foreigners do not need to have a permanent presence there.

VOA: standard.2009.09.04

Well, if it is a good electron donor in an electron transfer reaction, if the same element finds itself in a covalent bond, it is going to be a good electron donor, although it is not full transfer.

如果它是一个在电子反应中,的好捐赠者，如果相同电子发现他在共价电子里，它将成为一个好的捐赠者，虽然没有完全转换。

麻省理工公开课 - 固态化学导论课程节选

The closed system allows energy to transfer through the boundary but not mass.

闭系允许能量通过它的边界传递,但质量不行。

麻省理工公开课 - 热力学与动力学课程节选