Sicromal
铝铬硅耐热钢
🗣️ 情景例句
Are you worried?
你担心吗
It's quite probable.
完全有可能。
The development of such a telescope will be one of the great astronomical projects of the twenty-first century.
而开发这样一台望远镜将会是21世纪天文学的一个重要的研究课题。