It was noticed that this strange thing had been occurring every day latterly.

大家注意到，近来这种怪事天天都在发生。

youdao

It was noticed that there was a moment when his countenance became very sombre.

大家注意到他的神色在某一时刻显得非常沉郁。

youdao

Then, two days ago, it was noticed that Mr Obama's hair appeared dark and youthful again。

然而两天前，人们注意到奥巴马的头发又变回了黑色，显得朝气蓬勃。

youdao

As he tells it,one day he looked in the window of a school and noticed how dark it was.

VOA: special.2009.12.21

Now, if I was a person that was designing a vaccine and I noticed that this was the response that it got, that antibodies were produced, they reached some intermediate level, they started to fall, I would say, "Well I haven't stimulated the immune system enough, let me re-boost, let me give another dose of antigen."

现在,如果我正在研究一种疫苗,我注意到机体会对这种疫苗产生应答,也就是会产生抗体,当抗体浓度达到中等水平后,就开始下降,就可以说,疫苗对免疫系统刺激还不足,我需要提高抗原浓度,让我再把剂量再加大一倍

耶鲁公开课 - 生物医学工程探索课程节选

He bent to pick it up. Just as he was about to throw it into the wastepaper basket, he noticed that the letter was signed by his business partner, Thomas Antrim.

VOA: special.2010.05.29

It took a worker smelling crude oil on the ground before it was noticed.

NPR: Alaskans Speak Up About Oil Field Shutdown

Needless to say, it was noticed instantaneously, causing an almost immediate decline in Bush's poll ratings.

NPR: Looking at President Bush, Seeing an 'Impostor'

Her item was a short one, but it was noticed by several newspapers.

ECONOMIST: Rosemary Brown