adj.

固体的; 实心的; 结实的，可靠的; 可信赖的

n.

固体; 立体图形; 立方体

He did not eat solid food for several weeks.

他数周以来都没有食用固体食物。

Solids turn to liquids at certain temperatures.

在特定温度下固体会变成液体。

The snow had melted, but the lake was still frozen solid.

雪已经融化了，但是湖面上仍然冻得结结实实的。