雨水导致河流堆积泥沙。

Yǔshuǐ dǎozhì héliú duījī níshā.

Rainwater causes rivers to accumulate mud and sand.

垃圾长时间堆积会影响环境。

Lèsè cháng shíjiān duījī huì yǐngxiǎng huánjìng.

Accumulation of garbage over time will affect the environment.

季节更替导致雪堆积在山上。

Jìjié gēngtì dǎozhì xuě duījī zài shān shàng.

Seasonal changes lead to the accumulation of snow on the mountains.