Material illustrating detailed structure of graptolites has been etched from limestone by means of hydrofluoric acid.表明笔石详细构造的物质是利用氢氟酸从石灰岩中侵蚀出来.She went on to art school and is now illustrating a book.她后来读了艺术学校，现在正在为一本书画...
他先快速地浏览页面，然后再细细阅读。He skimmed the pages quickly, then read them again more carefully.成功合并两家银行需要坚决快速地着手解决费用问题。Successfully merging two banks requires a fast and ruthless attack on costs.我会快速地翻页，直到找到要找的那一部分。I'll just f...