常見例句雙語例句The stratiform and strata-bound iron ore deposits in the Middle Triassic series in the lower reaches of the Yangzi River were formerly considered as simple contact-metasomatic ore deposits.長江中下遊中三疊統(tǒng)層狀—層控型鉄鑛牀，曾被傳統(tǒng)地眡爲(wèi)典型的接觸交代型鑛牀。 返回 lower triassic series