所有的展品都设计了栅栏、壕沟、墙壁或篱笆，不过不会使游客们难以看清展品。
All of the exhibits are designed with barriers, moats, walls or fencing, quite often fencing that's difficult for visitors to see.
暗墙；隐篱用来作栅栏，但又不阻碍视线或景观的护城河，或由墙围住的沟或陷入地中的篱笆。
A moat, walled ditch, or hedge sunk in the ground to serve as a fence without impairing the view or scenic appeal.
专家称，必须使用栅栏和篱笆使大型农田动物远离水源，这是非常重要的。
Experts say it is important to keep large farm animals away from water supplies with the use of a fence or barrier.
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