Polyphosphate
多磷酸盐
🗣️ 情景例句
Are you carrying any items that need to be declared?
你没有携带需要申报的东西吗？
This is a very bad performance.
这是一次非常糟糕的演出。
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。