「不動聲色」

(pos:語句)
<explanation>
yue:喺緊急情況下，講嘢、神態仍然同平時一樣，形容人非常鎮靜。
eng:not revealing somebody's feelings or emotions; not turning a hair
<eg>
yue:有人打劫銀行，銀行經理不動聲色，偷偷報警。 (jau5 jan4 daa2 gip3 ngan4 hong4 ngan4 hong4 ging1 lei5 bat1 dung6 sing1 sik1 tau1 tau1 bou3 ging2)
eng:Someone is robbing the bank, the bank manager did not turn a hair and secretly called the cops.