1. For Kennedy, it was an early political setback for a president untested on the world stage. 对于尚未被世界舞台考验的肯尼迪来说，这是他早期政治上所受的挫折。
2. Such drilling technology is untested, and digging these wells will require expert guidance. 这种钻孔技术还未经过测试，开凿这样的井也需要专业指导。
3. In addition to convincing consumers to try untested technology, BYD has to fight mistrust in the West of Chinese-produced goods. 此外，要说服消费者尝试未经考验的技术，比亚迪还需要打消西方不信任中国制造的态度。
英英解释
adj.
1. not tried or tested by experience
2. not yet proved or subjected to testing
