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
Ah. OK. That's a dollar and thirty cents change.
啊 ，好啦。这是一美元三毛零钱。
Neither fish nor flesh (nor good red herring).
非驴非马；不伦不类。
When a plane from London arrived at Sydney airport, workers began to unload a number of wooden boxes which contained clothing.
当一架来自伦敦的飞机抵达悉尼机场时，工人们开始卸下装有服装的一批木箱。