A barrier to doing sth的用法和樣例：
例句
- Constantly changing regulations and general high cost in doing business are formulable obstacles.
稅收規則經(jīng)常改動(dòng)以及做生意總成本的過(guò)高成了難以逾越的障礙。 - There was an impassable barrier between the white race and the one which they had reduced to slavery.
在白色人種和被他們奴役的種族之間有一道不可逾越的障礙。
