stream networks的用法和樣例：
例句
- Stream Sediment refers to particles that are transported or deposited in stream channels.
水系沉積物指河道中被運輸或沉澱的顆粒物。 - For example, the networks are arranged in dense, branching patterns, and the lengths and widths of the valleys increase from their sources to their mouths.
例如，這些網路呈現密集的分枝狀水系，河谷的長度與寬度也由上游向下游逐漸增加。
