The gravitational binding means that the galaxies and other material within a mature cluster have settled into an overall dynamic equilibrium. 重力束縛的意思是在一個(gè)成熟的星系團中，星系與其他物質(zhì)已經(jīng)達到穩定的整體動(dòng)態(tài)平衡。
It is a historical difficult issue that the socialist market economy should solve to realize efficiency and fairness dynamic equilibrium. 實(shí)現效率和公平的動(dòng)態(tài)平衡是社會(huì )主義市場(chǎng)經(jīng)濟所要解決的一個(gè)歷史性難題。
