Billionaires are usually fairly secretive about the exact amount that they're worth.亿万富翁通常对自己身家的确切数目讳莫如深。Billionaires swarmed into Nice to splurge millions during the summer holidays.暑期休假时,亿万富翁们群趋尼斯挥霍了百万巨款.Old age i...
Theage - metallicity relation AMR provides useful clues about the Galactic formation and evolution.年龄--金属丰度关系给出了银河系形成和演化的线索.Galactic surveys show that distant galaxies are not as evenly distributed in space as theory pre...