Ddf
[计] 数据库描述文件, 开发论证设施
🗣️ 情景例句
Six words.
有六个字。
As a senior, Peter is writing his thesis.
作为大学四年级学生，彼得正在写毕业论文。
After lunch Aunt Huang came in and she looked worried.
午饭后黄阿姨来了，她面带愁容。