defenseless

Without Christ we are defenseless against the Devil, but with "the helmet of salvation" our minds are protected by God.

没有基督，我们无力防御魔鬼的攻击；但有救恩的头盔，我们的心思便有神的保护。

They also suggest that the sounds may function to attract the attention of predators, in which case the intruder would be rather defenseless.

同时，还指出，这种声音还会吸引来食肉动物，在这样的情况下，入侵者在防御上就会处于明显的弱势。

"Human beings were small, defenseless and vulnerable to predators, " says Barbara J. King, biological anthropologist at the College of William and Mary and author of Evolving God.

“人类对掠食者而言是弱小、无力防御与易受伤害的，”威廉学院生物人类学家、《进化之神》的作者芭芭拉.J.金说。