adj. 冷酷无情的，描述竞争非常激烈
=fierce，tough, severe, relentless
翻译：The competition in the smartphone industry is cut-throat, only people who are well-adjusted can survive.
参考：In this cut-throat world, only the fittest will survive/prevail.
造句：Although online selling has been prosperous, small retail stores tend to disappear in this cut-throat business.
