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。

youdao

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。

youdao

To cause transformation of (a liquid or sol, for example) into or as if into a soft, semisolid, or solid mass.

使凝固引起(液体或溶胶)转为或似转为软的、半固体的或固体的物质。

youdao

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