眼镜蛇在受到惊吓时会展开颈部并发出嘶嘶声。

The ___cobra spreads its hood and hisses when startled.

那个表面友善的同事实际上是个阴险的眼镜蛇，总是在背后捅刀子。

That seemingly friendly coworker is actually a ___cobra, always stabbing people in the back.

两架眼镜蛇直升机在训练演习中展示了精确打击能力。

Two ___cobras demonstrated precision strike capabilities during the training exercise.