Five-tone mode has a long history and a solid mass base.

五声调式在我国有着悠久的历史和广泛的群众基础。

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Porous solid mass is an important material base in the formation of debris flow.

松散固体物质是泥石流形成的重要物质基础。

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Turning into a solid mass: I waited for her to materialize out of the clogging curdling crowd.

转成固体：我在拥挤的人群中等待着她的出现。

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Devotees make their own by brewing tea and sugar with a flat, solid mass of yeasts and bacteria.

WSJ: High Tea Has a New Meaning

The expected course of ovarian cysts varies with a woman's age, the size of the cyst, whether there is a family history of ovarian cysts, and whether the cyst is fluid-filled, appears to be a solid mass of tissue, or has both fluid and solid components.

CNN: What are the potential problems with ovarian cysts?

But unlike solid-mass tumors, glioblastomas have tiny tentacles that spread into the brain, making it impossible for a surgeon to remove every bit of the tumor.

FORBES: Taking on a Monster