not easily fooled; experienced and smart
不容易上当; 有经验且聪明 (bù róngyì shàng dàng; yǒu jīngyàn qiě cōngmíng)
"Don’t try to trick me — I was not born yesterday."
"别想骗我——我不是昨天出生的。" (bié xiǎng piàn wǒ — wǒ **bù shì zuótiān chūshēng de**.)
a gentle outward appearance hiding strong control
to repair a damaged relationship
fixed and unchangeable
about to be very surprised or shocked
to reveal a secret by mistake
to act in a way that goes beyond moral acceptability