Chemistry and biology, physics has the advantage that the desktop experiments can do are relatively straight forward than not dangerous.

化学和生物的话，物理有一个好处就是,桌面实验能做到,直观却不危险,地反映结果。

麻省理工公开课 - 媒体、教育、市场课程节选

So there is a kind of grammar of race that this boy is learning while he experiences language in all these other more visceral, family-oriented ways.

更直接地谈下去会有危险时,这男孩在学习地区或者种族语言,特有的表达方式，同时他的家庭影响也塑造着他的语言。

耶鲁公开课 - 1945年后的美国小说课程节选

And to the monarchists, he was a dangerous skeptic and free thinker.

而对于君主论者，他又是个危险地怀疑分子和自由思想家。

耶鲁公开课 - 政治哲学导论课程节选