立正

yǐ lì zhèng zī shì zhàn lì bù dòng

以立正姿势站立不动

stand at attention

jūn guān jìn wū shí měi yī wèi shì bīng bì xū lì zhèng zhàn hǎo

军官进屋时每一位士兵必须立正站好。

Every private soldier must stand to attention when an officer enters the room.

nà ge bīng jiǎo gēn kā dā yī shēng lì zhèng jìng lǐ

那个兵脚跟咔嗒一声，立正敬礼。

The soldier clicked his heels and saluted.