ha-ha

• 名词，有两个不同含义：一是响亮、常带嘲讽意味的大笑，类似马嘶声；二是景观中一种下沉式围墙或沟渠，带挡土墙，用于形成边界但不遮挡视线。

A noun with two distinct meanings: a loud, often derisive laugh resembling a horse's neigh; or a type of sunken fence or ditch with a retaining wall, used to create a boundary in a landscape without obstructing the view.

1. Loud laughB1informal

   A loud, often mocking or hearty laugh that resembles the sound of a horse neighing.

   哈哈大笑

   • He let out a loud ha-ha at the comedian's joke.
   • Her ha-ha echoed through the room, startling everyone.
   • The children's ha-ha could be heard from across the playground.

   同义词belly laughbraycackleguffawhoothorselaughroar

2. Landscape ditchC1formalbritish

   A sunken fence or ditch with a retaining wall on one side, used to create a boundary without obstructing the view of the landscape.

   哈哈墙

   • The estate was surrounded by a ha-ha to keep the deer out.
   • The garden's ha-ha provided an invisible barrier.
   • They built a ha-ha to separate the lawn from the pasture.

   同义词sunk fence