"hysterics" in Chinese (Simplified)
歇斯底里大发作止不住的笑（或哭）
Definition
一种无法控制的大笑或大哭的状态，通常由于极度情绪（如压力、兴奋或恐慌）引起。
Usage Notes (Chinese (Simplified))
常见搭配为 'in hysterics'，多用于指大笑，有时也指大哭或恐慌。属于非正式用法，多用于形容情绪失控且有些夸张的场合。
Examples
She burst into hysterics when she heard the joke.
她听到那个笑话就突然陷入**歇斯底里大发作**。
He was in hysterics after watching the comedy.
看完喜剧后，他完全进入了**歇斯底里大发作**状态。
The children were in hysterics during the puppet show.
木偶剧期间，孩子们都在**歇斯底里大发作**。
My sister was in hysterics after I slipped on the ice.
我在冰上摔倒后，我妹妹笑得**歇斯底里大发作**。
'Calm down, you're in hysterics!' the teacher said as the class laughed uncontrollably.
“冷静点，你们都**歇斯底里大发作**了！”老师对全班笑个不停地说。
She went into hysterics when she lost her phone at the concert.
她在音乐会上丢了手机后陷入了**歇斯底里大发作**。