In countries like Liberia, greater food security for the rural poor means small-holder yields must go up.
在像利比里亚这样的国家，为农村的贫困人口提供更多的粮食保障，意味着小农的田地也要迈进一步。
2
The most massive black hole in the universe weighs in at 18 billion times the mass of the sun — six times as massive as the previous record holder and as massive as a small galaxy.
宇宙中最大的黑洞相当于太阳质量的180亿倍——是前纪录保持者的6倍，其质量几乎相当于一个小星系。
3
Objective To investigate the therapeutic effects of arc blade holder in extracapsular cataract extraction and intraocular lens implantation through small incision.