Boundaryless
a. 无界限的
🗣️ 情景例句
Five.
五岁。
Great winds blow upon high hills.
树大招风。
'He had travelled only seven miles across the Channel when his engine failed and he was forced to land on sea.
但他只在海峡上空飞行7英里，引擎就发生了故障，他只好降落在海面上。