the Paleozoic group的用法和樣例：
例句
- The paleozoic source rock in North China went into the main oil generating period at the end of Triassic.
華北地區古生界生油岩在三疊紀末已進入主要生油期。 - Negative reversal structure and the fault - block type buried hills are very common in Palaeozoic group in Tongwang area of Dongying Sag.
負反轉構造和斷塊型古潛山普遍存在於東營凹陷通王地區古生界之中。
