歯垢をとらなければなりません。
Sentence Analyzer
English Translation
The plaque has to be removed.
Furigana
Romanji
Ha aka o toranakerebanarimasen.
Words
歯
(は)
tooth
垢
(あか)
dirt; filth; grime; account (e.g. online service)
を
(を)
indicates direct object of action; indicates subject of causative expression; indicates an area traversed; indicates time (period) over which action takes place; indicates point of departure or separation of action; indicates object of desire, like, hate, etc.
穫る
(とる)
to harvest (a crop)