Noun:

1. a measure of explosive power (of an atomic weapon) equal to that of one million tons of TNT

2. one million tons

Megag梅加格megaadj.巨大的adv.非常pref.表示“大；百万”Megablock超级街区megatheren.[古生]大地懒megaclone大柱骨片(动)megahertzn.[物]兆赫abbr.=MHzmegapolisn.(=megalopolis)大城市；多人口地megaversen.大宇宙及宇宙的一切事物megacolon[医]巨结肠(症)megacyclen.兆周megastria[医] 巨胃mega cell特大蜂窝区

1. Inspite of the various difficulties,Chengdao was develoed independantly into a megaton oilfield in a period as short as a few years.
   工程设计完全依靠自己的力量，克服了种种困难，在短短的几年内就将埕岛建设成为一个百万吨级的油田。