The camp has become a source of tension among Calais residents and in France's relations with Britain, with London pushing for tighter border control.

VOA: standard.2009.09.22

And that makes sense, too, because the positive three pulling on minus one has a tighter binding energy than positive one pulling on minus one.

而这也是有意义的，因为+3和-1的相互吸引,产生了比+1和-1的吸引,更强的能量。

麻省理工公开课 - 固态化学导论课程节选

And that makes sense, too, because the positive three pulling on minus one has a tighter binding energy than positive one pulling on minus one.

而这也是有意义的，因为+3和-1的相互吸引,产生了比+1和-1的吸引,更强的能量。

麻省理工公开课 - 固态化学导论课程节选