annular oriffice

例句：

1. 1. The engineer designed the machine with an annular orifice to improve efficiency.
   工程师设计机器时采用了环形开口，以提高效率。
2. 2. The scientist found that the annular orifice could reduce friction between the moving parts.
   科学家发现环形开口可以减少移动部件之间的摩擦。
3. 3.The construction worker used an annular orifice to create a tight seal around the pipe.
   建筑工人使用环形开口在管道周围创造了紧密的密封。