create barrier

• 设置障碍

create barrier的用法和样例：

例句

1. The farmers couldn't hold back the rising flood waters even with the barrier.
   农民们挡不住上涨的洪水，即使设置障碍物也没用。
2. What is crucial is the attempt by one State to isolate itself from a problem common to many by erecting a barrier against the movement of interstate trade.
   关键问题是，这一单个的州试图以设置障碍阻止州际贸易流通的方式，使自己在一个大家共同面临的问题中置身事外。