Nerva
n. 涅尔瓦（古罗马皇帝）
🗣️ 情景例句
How are you?
你好吗？
When will the ship leave for honolulu?
这艘船什么时候出发去檀香山？
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。