yī bǎ yào shi kāi yī bǎ suǒ
One key opens one lock.
There is a different solution for each problem. (idiom)
一
yī
one
把
bǎ
to hold; to grasp
钥
yào
key
匙
shi
used in 鑰匙|钥匙[yao4 shi5]
开
kāi
to open (transitive or intransitive)
锁
suǒ
to lock; to lock up
