重大 + Noun
重大 (zhòngdà) is an adjective meaning "major," "significant," or "serious." It is used to describe events, losses, or decisions of great importance or consequence. It typically modifies nouns directly, as in 重大损失 (major loss).
这次事故造成了重大的经济损失。
zhè cì shìgù zàochéng le zhòngdà de jīngjì sǔnshī.
This accident caused significant economic losses.
公司即将宣布一项重大决定,大家都很紧张。
gōngsī jíjiāng xuānbù yī xiàng zhòngdà juédìng, dàjiā dōu hěn jǐnzhāng.
The company is about to announce a major decision, and everyone is very nervous.
科学家们取得了一项重大突破。
kēxuéjiāmen qǔdé le yī xiàng zhòngdà tūpò.
Scientists have achieved a major breakthrough.