TOEFL单词短语学习：

blizzard n. 暴风雪，大风雪；大打击 (noun): a severe snowstorm with a lot of wind
- We couldn't reach our family's house because of the blizzard.

casualties n. 伤亡；人员伤亡（casualty的复数） (noun): people who are injured or killed in military action or accidents
- There were many casualties to due intense bombing in that region.

erosion n. 侵蚀，腐蚀 (noun): the process of wearing something down due to wind and rain
- Erosion of the soil can become a real environmental problem.

vegetation n. 植被；植物，草木；呆板单调的生活 (noun): plants in general
- Having vegetation in some areas can slow down the process of erosion.