Sddl
模式数据描述语言
🗣️ 情景例句
Have you ever done any correspondence work?
你有处理文书的经验吗？
They enjoin us to follow their example.
他们强要我们以他们为榜样。（有些象绕口令。）
but that was precisely the idea adopted in some of the early instruments (seismometers) for recording earthquake waves.
但是早期记录地震波的仪器（测震仪）正是采用了这种思路。