牛仔裤的接缝处开始脱线了。

The ___seam of the jeans is starting to come apart.

地质学家在勘探时发现了两层岩石之间有一条狭窄的煤层。

Geologists discovered a narrow coal ___seam between two layers of rock during their survey.

这件衬衫的接缝处有点开线了。

The ___seam on this shirt is starting to come undone.