He's not used to making speeches in public; it's so embarrassing.

"他不习惯在大庭广众中演讲,太使人窘迫了。"

He was dismissed for publicly insulting prominent politicians.

他在大庭广众之下辱骂政坛显贵，结果被撤职了。

She was rooted to her seat because she was afraid to speak in front of a large group.

她害怕在大庭广众前说话而坐定不动。