释义 |
frontierfron·tier /frʌnˈtɪr / noun - [usually singular] land that people are just beginning to live on, especially in the western U.S. in the 1800s(尤指 19 世纪美国西部的)开发地区边缘地带,边远地区◆frontier towns of the Wild West西大荒的边远城镇
- the frontiers [plural] the border between what we know and what we do not know(知识的)极限,边缘◆Scientific research is constantly pushing back the frontiers of our knowledge about the world.科学研究不断拓宽我们对世界的认识。
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