Early Ordovician的用法和樣例：
例句
- It means that the transgression in the Early Ordovician was more extensive than that in the Cambrian.
這表明早奧陶世的海進比寒武紀的更甚了。 - The tectonic framework of North Qilian in Early Ordovician should be similar to that of the Bafin Bay and the Queen Elizabeth Islands.
北祁連早奧陶世海域與現在加拿大北部巴芬灣及伊麗莎白女王群島的構造格局相似。
