study的过去式和过去分词怎么写 时间：2026-08-17 23:34:00 浏览：958次 Coincidentally, they had both studied in Paris.碰巧的是，他们俩都在巴黎学习过。He studied conscientiously and enthusiastically.他认真积极地学习。Many toxic effects can be studied at the cellular level.许多毒性作用在细胞阶段就可加以研究。 标签：study,过去分词,过去
