work like a charm
US /wɜrk laɪk ə tʃɑrm/
UK /wɜrk laɪk ə tʃɑrm/

1.
非常有效, 奏效
to be very effective or successful, often in a surprising way
:
•
I tried a new recipe for the cake, and it worked like a charm.
我尝试了一个新的蛋糕食谱,结果非常成功。
•
The trick to calm the baby always works like a charm.
哄宝宝的诀窍总是非常有效。