barrier,barricade,hinderance有什么区别

arrier 自然·人造,具体·抽象,什么样的障碍物,都可.
The mountains form a natural barrier.
Laziness is a barrier to success.
barricade 人造·具体的东西,特别用来阻断街道,作为庇护所,从后面扔石块等对抗.
The protesters set up barricades in the streets.
hindrance （不用 e 呢）拉后腿的,阻前路的,从前面·后面,凡是阻碍前进的什么,都可.跟 barrier 的抽象用法一样,后面应该加一个介词句（to ...）,说是对什么事情的阻碍.
His constant interference is a real hindrance to our progress.