The lower mantle may be a thick fluid, but unlike Earth's mantle, the upper part is solid.

底层的地幔可能是浓稠的流体，但与地球的地幔不同，其上地幔是固体。

In thick fluids such as honey, viscosity almost always wins.

在蜂蜜等粘稠液体中，粘度几乎总是获胜。

The high levels of urea irritate the serous pericardium, making it secrete a thick pericardial fluid that's full of fibrin strands and white blood cells.

高浓度尿素刺激浆膜心包，使其分泌富含纤维蛋白和白细胞的浓稠渗出液。