When Mary starts talking, no one else can get a word in edgeways.

玛丽讲起话来，别人谁也插不上嘴。

He talks so much that no one else can get a word in edgeways.

他讲得太多了，别人一句话也插不上嘴。

He talked on and on and nobody else could get a word in edgeways.

他说个没完，别人半句话也插不进。