... challenging shout 挑衅怒吼 challenging signal询问信号 challenging unit 攻击单位 ...
双语例句
1
Warily, the Sydney closed to within a nautical mile, challenging the Kormoran to show a secret signal and prove she was a friend.
悉尼号小心翼翼地靠到距它一海里的地方，要求Kormoran出示秘密信号，以证明它是朋友。
2
At present, the system research is a challenging problem both at home and abroad as it involves complicated signal processing and hardware designing technology.
由于涉及复杂的信号处理和硬件设计技术，系统的研制目前在国内外都是一个具有挑战性的课题。
3
The emerge of high performance ADC puts mixed signal testing field to a challenging situation.