yī mǎ sháo huài yī guō
one ladle (of sth bad) spoils the (whole) pot (idiom)
one bad apple spoils the barrel
一
yī
one
马
mǎ
abbr. for Malaysia 馬來西亞|马来西亚[Ma3 lai2 xi1 ya4]
勺
sháo
spoon
坏
huài
bad
锅
guō
pot; pan; wok; cauldron
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