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- An opening in a fortified wall;an embrasure. 射击孔，炮眼城墙上的开孔;炮眼
- An opening in a wall or fence for entrance or exit. 围墙门,篱笆门:墙壁或篱笆上的口子,作为出口或入口。
- An opening in a fortified wall; an embrasure. 射击孔，炮眼城墙上的开孔；炮眼
- An opening in a garment for an arm. 袖孔衣服上为胳膊留的孔
- An opening in a needle. 针眼
- An opening in the surface of a structure, as in a membrane. 薄膜开口一种在构造表面上的开口，如在薄膜上
- There is an opening in the hedge. 这篱笆上有个洞。
- The circular opening in a needle that carries the top thread through the fabric and into the bobbin assembly. 针里面的圆形开口,带着顶端针穿过织物,进入线轴组合里。
- There was an opening in the wall. 墙上有个洞。
- An opening in a data medium or device such as a card or magnetic core. 诸如卡片、磁芯等数据媒体或设备上的开孔。
- To look for a needle in a haysta. 浏览全文。
- A needle would stand out in a haystack. 一根针在干草垛里会很突出的。
- That's like looking for a needle in a hay stack. 那可真是大海捞针。
- An opening in a defensive formation,especially the area of a baseball infield between the third base player and the shortstop. 缺口，漏洞尤指棒球场上第三垒球手和游击手之间防卫阵形中的缺口
- Look for a needle in a haystack. 海底捞针
- We squeezed through an opening in the fence. 我们从篱笆上的豁口挤了过去。
- To look for a needle in a haystack. 草垛里找针(大海捞针)。
- An opening in a thick wall for a door or window,especially one with sides angled so that the opening is larger on the inside of the wall than on the outside. 斜面洞在门或窗的厚壁上开的一个洞，尤指有斜面角的，这样里面开的比外面开的大
- Reid: A needle would stand out in a haystack. （一根针在干草垛里会很突出的。）
- An opening in the pipe of an organ. 口琴乐器管上的开口
