Handite
含锰砂岩
🗣️ 情景例句
They live from hand to mouth.
他们过着糊口的生活。
We can't stop it.
我们不能阻止它。
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。