淤积

yōu chóu yū jī zài tā xīn tóu

忧愁淤积在她心头。

Worry was pent up in her heart.

hóng shuǐ guò hòu dì li yū jī le yī céng ní

洪水过后，地里淤积了一层泥。

When the flood subsided, it left a layer of mud in the fields.

zhè lǐ yū jī ní zhì

这里淤积泥滞。

Here becomes filled with silt.

ní shā yū jī

泥沙淤积

sedimentation