我是一名助教（Teaching Assistant，简称TA，国外大学多由校内学生申请担任），每周晚上两节实验课。通常，我们学生迟10分钟以上到实验室，当天的课堂成绩就是0分。除非你有医疗证明或者警方报道才能免受处罚。

I was a TA, running twice weekly lab sessions in the evening. Being more than 10 minutes late to a lab usually earned a 0 grade for the day, so you usually needed a medical note or police report to get out of it.

有一个迟到20分钟的学生，课后反复向我道歉。他是一个很安静、谦逊的中国学生，戴着眼镜，英语不太好。

At the end of class, one student who was 20 minutes late came up to me and apologized profusely. He was a quiet, unassuming Chinese guy with glasses and a below average grasp on the English language.

他跟我说，他走路上学，在停车场附近目击一个男的对着自己前面的陌生人开了几枪。随后嫌犯快速跑掉了。

He told me that while he was walking to class, a guy in front of him was shot multiple times by a man in a nearby parked car, which then sped off.

这个学生说，他赶紧冲过去，试图跟另一个过路的目击者一起照顾受害者，但遗憾的是，最终受害者还是在救护车赶到前就死了。

He claimed that he rushed over to the man, and attempted to attend to his wounds along with another bystander, but that he died before the ambulances arrived.

当时我的第一个想法就是，这也太扯了吧！

My first thought was, that's ridiculous.

但后来我注意到他的衬衫、牛仔裤和前臂，到处都是血迹。我还没来得及说点什么，中国男孩就径直走了。

But then I noticed his shirt, jeans, and forearms covered in blood. Before I had a chance to really say anything, he beelines it to the exit and leaves.

忍不住好奇，几小时后，我在网上搜索了“多伦多枪击致死”的关键词。结果发现，一篇14分钟前更新的文章里，的确报道了这起当天早些时候发生的枪击命案，而且案发地点的确离学校不是特别远。

A couple hours later, out of curiosity, I Google 'Toronto shooting death' and sure enough, there's a 14-minute old article describing a fatal shooting that occurred earlier in the day, not terribly far from campus.

“第二天，我就收到了课程讲师的邮件说，这名学生提交了一份警方报告，他的确是此次案件的目击者，也尽力去帮助伤者！"
The next day, I get an email from the course instructor, informing me that the student had submitted a police report to confirm his involvement in the incident.

前几分钟刚有一个人在自己的怀里死了，然后他竟然尽全力过来上课了！简直是无法想象，他默默坐在最后一排，是怎么消化掉这个事情的......

Held a man in his arms as he died and still made the effort to come to class. I can't even imagine what that guy was going through, as he quietly sat in the back of that room.I can't even imagine what that guy was going through, as he quietly sat in the back of that room.

留学前