<正> Delta Scuti stars are variables of spectral types A to F with a pulsation period less than 0.3 days and light varia......

A、如果花瓶碎了,怎么办?大多数人的做法是,把碎片扔掉! 且一扔了事,干脆利落,全然不曾思考与之有关的规律。 那么,这里头有规律吗......