a filthy mouth cannot utter decent language

gǒu zuǐ lǐ tǔ bù chū xiàng yá ㄍㄡˇ ㄗㄨㄟˇ ㄌㄧˇ ㄊㄨˇ ㄅㄨˋ ㄔㄨ ㄒㄧㄤˋ ㄧㄚˊ