alluviums

n.clay or silt or gravel carried by rushing streams and deposited where the stream slows down

同义词：alluvial sedimentalluvial depositalluvion

1. The two countries are allying against a common enemy.
   这两个国家正在联合对抗一个共同的敌人。
2. The political party is allying with several smaller groups to win the election.
   这个政党正在与几个小党派联合，以赢得选举。