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巖在三疊紀末已進(jìn)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于東營(yíng)凹陷通王地區古生界之中。
