太平洋西北部以其崎岖、参差不齐的海岸线而闻名。

The Pacific Northwest is known for its rugged, ___irregular coastline.

在徒步小径上要小心；这条路非常崎岖且多岩石。

Be careful on the hiking trail; the path is very ___irregular and rocky.

这位艺术家从河床收集了形状不规则的石头，用于她的雕塑。

The artist collected ___irregular stones from the riverbed to use in her sculpture.