It is one of the oldest observed weather events on Earth.

它是地球上观测到的最古老的天气事件之一。

They're likely to have star parties, public observing events, where you can look at and through different kinds of telescopes.

他们通常会举办观星聚会、公开观测活动，在这些活动中你可以通过不同种类的望远镜进行观测。

Iryna Vereschuk said it was the one organization able to prevent death but had so far just been observing events.

Iryna Vereschuk说，联合国是唯一一个能够防止死亡发生的组织，但到目前为止，它只是观望事件发展。

Lightning is a strong burst of electricity in the atmosphere. It is one of the oldest observed weather events on Earth.

闪电是大气中的强放电现象。闪电是地球上最早观察到的天气现象之一。

While scientists had observed past star expansions, this was the first time they have been able to observe a complete planet-swallowing event.

虽然科学家们已经观察到了过去的恒星膨胀，但这是他们第一次能够观察到一个完整的行星吞噬事件。

The beginning of today's show gave you a sense of what it was like to observe the events of September 11th as they unfolded.

今天节目的开始便让你感受到了911事件发生时的情景。

Prof. Smith is currently recruiting one student to assist with their research project on campus sports activities. Duties include assisting with data collection and analysis, conducting surveys, and observing sports events on campus.

史密斯教授目前正在招募一名学生来协助他们的校园体育活动研究项目。职责包括协助数据收集和分析、进行调查以及观察校园体育赛事。

Darwin was able to observe dramatic and  exciting natural events in-person when in Brazil, and noted with great interest  an incident in which he had witnessed a vampire bat bite a horse, and made notes  on glow worms, butterflies and fungi.

达尔文在巴西时能够亲自观察戏剧性和令人兴奋的自然事件，并饶有兴趣地注意到他亲眼目睹吸血蝙蝠咬马的事件，并记录了萤火虫、蝴蝶和真菌。