Aavso
abbr. American Association of Variable Star Observers 美国变星观测者协会
🗣️ 情景例句
I'll bring the dog over by nine.
我在九点之前把狗送来。
Which umpire will referee the baseball game?
不知道哪一个裁判要执法这场棒球赛？
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。