opened end

例句：

1. 1.The engineer carefully measured the length of the opened end of the pipe.
   工程师仔细测量了管道开口端的长度。
2. 2. The carpenter used a saw to cut the opened end of the wooden plank.
   木匠用锯子将木板材的开口端切割开。
3. 3.The scientist discovered that the opened end of the sample container was contaminated with foreign matter.
   科学家发现样本容器开口端被外来物质污染了。