求大神帮我翻译两个英文句子
Theanswerliesapparentlynotintheincreasedenergycostsofexaggeratedbegging-such energycostsaresmallrelativetothepotentialgainincalories-butratherinthedamagethatanysuccessfulcheaterwoulddotoitssiblings,whichsharegeneswithoneanother.这句主要是butrather这一部分不懂,那部分是什么意思???
Therefore,abeggingnestlingthatsecuresfoodattheexpenseofitssiblingsmightactuallyleavebenindfewercopiesofitsgenesoverallthanitmightotherwise.