这条道越过瓦尔山口之后，穿过于拜河畔圣保罗。After going over the Col de Vars, the route passes through St-Paul-sur-Ubaye.之后，他们一口气开到圣保罗。After that they drove clear over to St Paul.圣保罗大教堂的穹顶the dome of St Paul's Cathedral...
When this tensor vanishes, the space is calleda flat.当这一张量为零时,空间叫做平直空间.If the circulation vanishes at one instant of time, it must vanish for all times.只要环量在某一瞬间为零, 它就必须永远为零.With this said, the old man vanishes out of si...