barrier
n.栅栏;障碍
例句：
This normal human reaction is used to protect usby signaling danger and preparing us to deal withit. Unfortunately, people create inner barriers witha help of exaggerating fears.
这种正常的人类反应是用来保护我们的，它发出危险信号，让我们做好应对危险的准备。不幸的是人们通过夸大恐惧来制造内心的障碍。