This was a treacherous act of betrayal by the Irish.

这是爱尔兰人可耻的背叛行为。

youdao

For Stepney to share 780 pages of confidential Ferrari technical information with a McLaren employee was a heinously treacherous act.

斯蒂芬尼与一位迈凯伦雇员分享780页的技术资料可是一项令人憎恨的行为阿。

youdao

Defence Secretary Liam Fox said the "despicable and treacherous" act would "not dent the resolve of the colleagues they leave behind".

BBC: UK soldiers killed by rogue Afghan named by MoD