障碍

• Most cases of aplastic anemia are idiopathic .
  多数再生障碍性贫血的病例是自发性的。
• There are many formidable obstacles to overcome .
  存在着许多需要加以克服的重大障碍。
• Poor health may be a bar to success in life .
  健康不佳可能成为人一生中取得成功的障碍。
• The engines would stall when you stepped on the gas .
  你一踩大油门，那引擎就要发生障碍。
• What exactly is the obstacle ?
  到底障碍在哪里？
• The existence of barriers to entry would reduce competition .
  进入市场的障碍会降低竞争性。
• There may be some residual disturbances in speech and gait .
  言语和步态可能有一些残留障碍。
• Wound contraction can produce serious functional impairment .
  伤口收缩能造成严重的功能障碍。
• She should make it difficult for him to get into the house .
  她必须设置障碍，不让他进入房间。
• Stones whet a sword , difficulties strengthen will-power .
  石头是刀的朋友，障碍是意志的朋友。