That birth date is in April 1979, when the supernova explosion that signaled the collapse of the star was spotted flaring brightly in the M-100 galaxy by a school teacher using a telescope.

该出生日期是1979年4月，当时一位学校老师用望远镜发现了发出恒星塌陷信号的超新星爆炸，因为在M - 100星系那里有明亮的光亮。

youdao

Eg.The teacher has got the truth. I "m afraid you" ll have to face the music.

老师已知道了真相，恐怕你不得不听老师训话了。

youdao

I 'm busy listening to the teacher while at the same time looking at the comic book.and I must hide it quickly every time the teacher comes near.

我一边忙着听老师讲课，一边忙着看小画册，等老师走过来时，还得忙着把它藏起来。

youdao

I'm not going to write them on the board like a little high school teacher.

我不会在黑板上写出来,像一个高中老师那样。

麻省理工公开课 - 固态化学导论课程节选

As part of my report for the Today programme I'm also speaking to a teacher at another school who is worried that technology is a distraction rather than an aid for pupils in her English literature lessons.

BBC: iSchool - can tech really deliver education?

"I live across the street from my school, I'm a neighborhood teacher, I walk to school just like Christa did, " she said.

CNN: The Challenger disaster's teachable moment

"I'm looking for the children that might be withdrawn or something like that, " says teacher Mike Brass.

CNN: Treating children's emotional wounds