Safety isn't just a policy, it's a culture that must be lived every day in our mines.
马奇太太知道经验是一位优秀的教师,如果有可能,她就会让孩子们自己去接受它的教训,而这些教训,她本来希望来得轻松些,只要她们从善如流,不像对导泻的番泻叶加盐那样抗拒。