美 [fens aʊt]
挡住，阻挡：用篱笆或围栏将某物或某人挡在外面，防止其进入或接近。
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... fence off栅栏隔开 fence out隔开 fence seson禁猎期 ...
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These herbs are said to fence out influenza.
这些药草据说可预防流感。
To grow vegetables in out backyard, we have to fence out the chickens.
在后院种菜，我们必须树栅防鸡。
The two men broke out of their cells and cut through a perimeter fence.
那两个男人逃出牢房并穿过了一道围墙。
The batter can run to all four bases if he hits the ball over the fence or out of the ballpark.
VOA : special.2009.04.12
Rather than attempting to fence out the wildlife (including bobcats and black bears) from this rugged Eden, they have, Jurassic Park-style, fenced themselves in.
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This includes about 4.5 miles (7.2km) of fence to keep out reptiles and 2.2 miles (3.5km) for newts.
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For those of you who are still on the fence, check out the Reactor's demo video after the break.