(in nouns) very large or great巨大的◆a megastore巨型商店◆Japan's four megabanks日本银行业四大巨头 () (in units of measurement) one million(度量单位)一百万◆a 500-megawatt electricity plant500 万千瓦发电厂◆The chip runs at 510 megahertz.这个芯片运行速度为 510 兆赫兹。 () 1 048 576 (= 220)兆(1 048 576 或 220)◆a memory of 16 megabytes16 兆字节的内存