Trapp
n. 暗色岩
🗣️ 情景例句
Oh, I'm glad that's over.
噢 我真高兴终于结束了。
What a coincidence!
真巧！
The second marks the arrival of transverse vibrations which travel more slowly and arrive several minutes after the first.
然后记录下的是横向波的到达，横向波比纵向波传播得慢，在纵向波到达几分钟后才能到达。