Dahn
渔具无线电浮标
🗣️ 情景例句
with the school board,
和联合校董会一起，
I ate oatmeal for breakfast yesterday.
我昨天早饭吃的是麦片。
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。