Hxen.com's tips：Every day persisted can learn English well!-->■Learn English Everyday■
monument – n. a building or place that is important because of when it was built or because of something in history that happened there
journal – n. a magazine that reports on things of special interest to a group of people
drag – v. to pull (someone or something that is heavy or difficult to move)
roller – n. a part that rolls and is used to move, press, shape, spread, or smooth something
route – n. a part that rolls and is used to move, press, shape or spread something
core sample – n. a small part of a larger formation
