Final answer:
The sentence 'Me cepillo los dientes lentamente' is grammatically correct and it means 'I brush my teeth slowly' in English.
Step-by-step explanation:
The sentence 'Me cepillo los dientes lentamente' is grammatically correct. It translates to 'I brush my teeth slowly' in English. In Spanish, the subject 'me' is used to indicate reflexive actions, where the subject is also the object of the action. In this case, it is the speaker who is brushing their own teeth. The verb 'cepillo' (from the verb 'cepillar') means 'brush', and 'los dientes' means 'the teeth'.
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