词汇讲解：
1. desert n. 沙漠
例句：Vast areas of land have become desert.
大片的土地已变成沙漠。
2. population n. 人口
例句：The population of this city is in the neighbourhood of three million.
本市人口接近300万。
3. drought n. 干旱(时期)
例句：The crops failed because of the drought.
干旱造成农作物歉收。
4. embrace vt. 接受
例句：She embraced my offer to go to the hospital.
她接受了我的建议去看医生。
5. barrier n. 屏障；障碍物
例句：The fence acts as a barrier.
篦笆可作屏障。
6. erosion n. 腐蚀, 侵蚀; 磨损
例句：Crop rotation helps prevent soil erosion.
农作物轮作有助于防止水土流失。
7. survive v. 幸存, 活下来
例句：These plants cannot survive in very cold conditions.
这些植物在严寒中不能存活。
8. cereal n. 谷类植物, 谷物 例句：Wheat and rice are cereals.
小麦和水稻是谷类植物。
9. surprisingly adv. 惊人地;出人意外地
例句：It was surprisingly cheap.
它是出乎意料的便宜。
10. resist v. 抵制, 抵抗
例句：They were powerless to resist.
他们无力反抗。
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