VOA慢速英语:'The Diamond Lens' by Fitz-James O'Brien, Part Two

Anton Leeuwenhoek - a Dutch tradesman and scientist, best known for his work on the development and improvement of the microscope and also for his contribution towards the study of microbiology

carat - n. a unit for measuring the weight of jewels (such as diamonds) that is equal to 200 milligrams

drunk - adj. having drunk so much alcohol that normal actions (such as talking, thinking, and moving) become difficult to do

commit - v. to do (something that is illegal or harmful)

drop - n. a very small amount of liquid that falls in a rounded shape

wrinkle - n. a small line or fold that appears on your skin as you grow older — usually plural