Frontiers
n. 边界( frontier的名词复数 ); 边境; 开发地区的边缘; 尚待开发的领域
🗣️ 情景例句
He told me he was very impressed with you.
他告诉我他对你印象很好。
You look tired. Have you been getting enough sleep?
你似乎累了。睡眠充足吗？
She'll come if she can.
如果可能的话，她会来的。