2 sentences

1. 他在正式宴会上醉酒失态，表现得非常失礼。

   tā zài zhèng​shì yàn​huì shàng zuì​jiǔ shī​tài, biǎo​xiàn de fēi​cháng shī​lǐ.

   He lost his composure while drunk at a formal banquet and behaved very rudely.

   Source: Dong Chinese Dictionary

2. 面对记者的连续追问，那位平时冷静的官员竟然当众失态了。

   miàn​duì jì​zhě de lián​xù zhuī​wèn, nà wèi píng​shí lěng​jìng de guān​yuán jìng​rán dāng​zhòng shī​tài le.

   Faced with continuous questioning from reporters, the normally calm official actually lost his composure in public.

   Source: Dong Chinese Dictionary