YOU SAID:

I start rigorously brushing my white teeth

INTO JAPANESE

私は厳密に私の白い歯を磨くことを開始する

BACK INTO ENGLISH

I start to polish my white teeth strictly

INTO JAPANESE

私は白い歯を厳密に磨くようになる

BACK INTO ENGLISH

I will polish white teeth precisely

INTO JAPANESE

私は白い歯を正確に研磨します

BACK INTO ENGLISH

I polish white teeth precisely

INTO JAPANESE

私は白い歯を正確に磨く

BACK INTO ENGLISH

I polish white teeth precisely