笑里藏刀的英文：
[Literal Meaning]
smile/inside/hide/dagger
There are daggers in man's smile.

[解释]
形容对人外表和气，内心却阴险毒辣。

[Explanation]
with murderous intent behind one's smiles

[例子]
别看他总是很和气，其实是笑里藏刀，内心很歹毒。

[Example]
Although he always looks very nice, he hides a dagger in his smile and has a vicious heart.

[英文等价词]
a velvet paw
an iron hand in a velvet glove
Velvet paws hide sharp claws

cover the dagger with a smile;Murderous intent behind one's smile.
笑里藏刀。

A smile to hide one's hate
笑里藏刀

The smiler with the knife under the cloak
笑里藏刀

His smile was tinged with cruelty
他笑里藏刀。

Behind the smiling eyes lurks the evil that led her to murder the two babies in her care.
她笑里藏刀，杀害了她照顾的两个宝宝。