Dcsf
abbr. Dry Caisson Storage Facility 干沉箱储存设备
🗣️ 情景例句
I know.
我知道。
Open your books and turn to page 20.
打开书，翻到第20页。
I have just heard from my sister, Mary.
我刚收到我妹妹玛丽的一封信。