Oh, you're being a really good sport about this, Marilyn,
噢,在这件事情上,你倒变成一个看得很开的人, Marilyn?nbsp;
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。