They've pieced together his movements for the last few days before his death.
他们已理清了他去世前几天的活动情况。
2.crime scene 犯罪现场
Photographs of the crime scene began to arrive within twenty minutes.
不到20分钟，犯罪现场的照片就开始传来了。
3.message board 留言板
Have your say on our message board by clicking here.
在留言板上留言请点击这里。
4.out front 外面
We told him to wait out front with the engine running.
我们告诉他在外边等着，不要熄火。
5.a number of 许多
Two significant constants have been found in a number of research studies.
若干研究已经发现了两个重要常量。
