barrier

• The crowds were pressing against the barriers .
  人群向着栅栏推挤。
• The cell surface barrier had been broached .
  细胞表面屏障被凿开。
• The trouble started at the ticket barrier .
  在检票口出现了麻烦。
• What a coil, and what a barrier !
  多大的麻烦，多大的障碍啊！
• This would amount to a significant entry barrier .
  这就成为一个重大的加入障碍。
• Together they had shoved aside temporary barriers .
  他们联合起来推开了临时路障。
• Polyethylene is an excellent barrier to water vapor .
  聚乙烯保水蒸汽的性能良好。
• The lorry shaved the barrier , scraping its side .
  那辆卡车掠过路障，刮坏了车身。
• The existence of barriers to entry would reduce competition .
  进入市场的障碍会降低竞争性。