gutless vectors无病毒基因的病毒载体
Gutless adenovirus也称为裸腺病毒
Gutless weasel没胆的混球
Gutless Ghoul无胆食尸鬼
gutless s没有勇气的
You're gutless你没种
You are gutless你是个胆小鬼
gutless adenovirus vector无肠腺病毒载体
A Gutless Vampire细胆鬼
ADJ（形容词） If you describe someone as gutless, you think they have a weak character and lack courage or determination. 胆小的[表不满]
By attacking me, by attacking my wife, he has proved himself to be a gutless coward.
通过袭击我，袭击我妻子，他已经证明了自己是一个胆小的懦夫。