They don't have any spines or defensive mechanisms.

它们没有任何刺或防御机制。

These young Tyrannosaurs have a special defensive mechanism, a mouthful of bacteria.

这些幼霸王龙有特别的防御机制——满嘴的细菌。

Well, itching is pretty annoying, but it's a pretty smart defensive mechanism.

嗯，痒这种感觉很烦人，但这是一个非常聪明的防御机制。

His ego would have been in great danger of becoming a rigid prison for his intuitive self, because of the necessary defensive mechanisms it had to adopt against the most difficult and threatening aspects of his mother's personality.

他的自我原本会有很大的危险，成为他直觉的自己的一个僵固的监狱，因为它必须采取必要的防御机制来对付他母亲人格中最困难和最具威胁性的种种面向。