惩罚学生的工作

Citing a 1969 case in Iowa involving students who wore black arm bands to protest the Vietnam War, Greenaway wrote that a student may not be punished for merely expressing views unless the school has reason to believe that the speech or expression will 'materially and substantially disrupt the work and discipline of the school.

"'引用1969宗爱荷华涉及学生身着黑色臂带，以抗议越南战争，保加利亚写道，"一个学生可以不受到惩罚，只是表达意见，除非学校有充分理由相信，讲话或发表会'实质上大幅扰乱工作和纪律的学校。

Means the parent directory, so this command means to execute "toolchain.sh," which is in the current directory.

代表父目录，所以这个命令就是执行当前目录下的"toolchain.sh"。

Yes,In fact,I'm on our city ream.

是的。事实上我是我们市队的。