- Europeans did not know of them until the 1500s, when Portuguese ships arrived on the coast of what is now sierra Leone.
2017年12月六級(jí)真題（第一套）閱讀 Section C
- In the sierra high country, the number of big trees has fallen by more than 55 percent; in parts of southern California the decline was nearly 75 percent.
2019年高考英語(yǔ)浙江卷 閱讀理解 閱讀C 原文
- No area was spared or unaffected, from the foggy northern coast to the Sierra Nevada mountains to the San Gabriels above Los Angeles.
2019年高考英語(yǔ)浙江卷 閱讀理解 閱讀C 原文