Biological systems have been doing this for billions of years...生物系统亿万年来一直都是这样。Billions of pounds are riding on the outcome of the election.几十亿英镑都取决于这次选举的结果。Israel accepted billions of dollars in war reparations.以色列得到了几十...
Biological systems have been doing this for billions of years.生物系统亿万年来一直都是这样。Billions of pounds are riding on the outcome of the election.几十亿英镑都取决于这次选举的结果。Israel accepted billions of dollars in war reparations.以色列得到了几十亿美...