1. 場(chǎng)后圍欄用于阻止球被投出或打出比賽場(chǎng)地的一種屏障或柵欄，如在棒球比賽中
   A screen or fence used to prevent a ball from being thrown or hit far out of a playing area, as in baseball.
2. 修建這堵高墻作為屏障以防外人闖入。
   The high wall was built as a defence against intruders.
3. 這座山高而陡，形成一道巖石屏障。
   The mountain rose up in a steep wall of rock.
4. 撒哈拉沙漠是北非與中非之間的天然屏障。
   The Sahara Desert is a natural barrier between North and Central Africa.

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