lower Cambrian series的用法和樣例：
例句
- Dolostone is the main rock type of the Cambrian in this area.
從下寒武統石龍洞組開始都是白雲岩沈積。 - The closure of Kabei structure decreased to some extent, but the conditions still existed for the formation of relic Lower-Middle Cambrian gas reservoirs.
卡拉構造的圈閉幅度有所減小，但仍具備形成中下寒武統殘存氣藏的條件。
