呆牛英语特点：及时性 、 热点性 、 新潮流行性和趋势性。例句和解释原汁原味。欢迎留言和交流学习。
on the back foot/put someone on the back foot
If someone is on the back foot, or if something puts them on the back foot, they feel threatened and act defensively.
What's happening: Republicans slammed the companies for alleged anti-conservative bias, but Democrats largely narrowed their focus to possible competitive abuses, putting the CEOs on their back feet and producing some surprising admissions. （Axios）
go down the rabbit hole
Used especially in the phrase going down the rabbit hole or falling down the rabbit hole, a rabbit hole is a metaphor for something that transports someone into a wonderfully (or troublingly) surreal state or situation. On the internet, a rabbit hole frequently refers to an extremely engrossing and time-consuming topic. (dictionary.com)
Wednesday's House antitrust hearing with the CEOs of Facebook, Google, Amazon and Apple went down some politically fraught rabbit holes, but also saw tech's most powerful figures face sharper questions than they've seen before from Washington. (Axios)
adjective [ after verb ]
If someone or something is boxed in, he, she, or it cannot move, because of other people or things that are too close.
Foreign Minister makes clear Australia will not be boxed in when it comes to China or the US. (ABC)
noun [ U ] /ˈɡrænˌstæn.dɪŋ/
acting or speaking in a way intended to attract the good opinion of other people who are watching
Attorney General Bill Barr finally testified Tuesday before the raucous House Judiciary Committee, where grandstanding and bomb-throwing tactics by lawmakers have become a staple of oversight hearings in the Trump era. （Axios）
adjective formal /vaɪˈtuː.pə.reɪ.t̬ɪv/
A vituperative spoken or written attack is full of angry criticism.
In that pursuit, it has engaged in economic and military coercion, vituperative diplomacy, unfair trade practices, disregard of many elements of international law, and cyber theft and other forms of espionage aimed at acquiring trade and technology secrets. （National Interest）
To decide that someone or something will not succeed and so to stop giving them your attention and energy
Which is why it may be premature to write Trump off, says Kim Hoggard, a former government staffer who served in both the Reagan and George HW Bush administrations. （ABC News）