YACC(Yet another compiler -compiler), developed by Bell Lab, is a important software with UNIX, and can run on some other OS.
YACC是美国贝尔实验室的软件产品，是UNIX操作系统下的软件开发工具之一，也可在非UNIX环境下运行。
In the days just before this sketch appeared, Bell had not been working in his lab.
在这个草图出现之前的几天里，贝尔并没有在他的实验室里工作。
On both sides of east road, there were the teachers' office, one chemical lab, one physical lab, a big copper bell, the school handy men's dorm, the school clinic and students' dorms.
东路两旁排列着教师办公室、化学实验室、物理实验室、大铜钟、校工宿舍、校医室、学生宿舍；
On both sides of east road, there were the teachers' office, one chemical lab, one physical lab, a big copper bell, the school handy men's dorm, the school clinic and students' dorms.
东路两旁排列着教师办公室、化学实验室、物理实验室、大铜钟、校工宿舍、校医室、学生宿舍；
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