frontiers

US

UK

B1 中級
n. pl.名詞 (複數)國境;邊境
The frontiers of my country are guarded by soldiers
n. pl.名詞 (複數)研究發展的最前沿
We are exploring new frontiers in the human mind
n. pl.名詞 (複數)邊疆;邊陲
There are frontiers outside the city that still don't have electricity
n. pl.名詞 (複數)邊界
The European Union has open frontiers between member states.
n. pl.名詞 (複數)新領域
Space exploration is one of the last great frontiers.

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