adder gate

例句：

1. 4.例句：1. The adder gate is a type of fence that prevents animals from crossing the boundary.
   陷阱门是一种防止动物穿越边界的栅栏。
2. 2. The adder gate was designed to keep children safe while playing in the park.
   陷阱门被设计来在公园里玩耍时保护儿童的安全。
3. 3.The adder gate was installed at the entrance of the school, preventing trespassers from entering.
   陷阱门在学校入口安装，以防止闯入者进入。