Yes, we have done a little. But we have just started and have nothing to show you.
有,我们做了一些,但是因为我们才刚起步,并没有任何资料可以提供给你们。
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。