| frontier | |
| 级别 | 第5级 |
| 音标 | [ ˈfrʌntɪə(r) ] |
| 解释 | n.国境，边境；尚待开发的领域 |
| 英英释义 | a border between two countries , or ( especially in the past in the United States ) a border between land used to grow crops where people live and wild land |
| 发音 |  |
| 例句 |
1. The frontier station was starved for food and water. 边防站急需食物和水。 2. Areas near the frontier were rough and lawless in the old days. 过去边远地区混乱不堪，而且没有法律。 |
