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1.search engine 搜索引擎
例句：I'm usually just using the search engines to look up information.
我通常只是用搜索引擎找一些资料。
2.ground-based 地面的
例句：To detect these waves, astronomers use several kinds of large ground-based telescopes.
为了探测这些波, 天文学家们使用了各种类型的地面大型望远镜.
3.disaster relief 赈灾
例句：In addition, the SBA is well known for its disaster relief program.
除此以外, 小企业管理局还以其救灾计划著称。
4.sea level 海平面
例句：The stadium was 2275 metres above sea level.
这个体育馆海拔 2,275 米。
