You need to buy a tongue scraper and get all the stuff off of your tongue.

您需要购买舌刮板和得到所有的东西从你的舌头。

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When brushing your teeth, brush the back of your tongue, too, or scrape it with a tongue scraper.

刷牙时，还要刷刷舌根，或用刮舌器将舌头刮干净。

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If you have trouble with gagging, stick your tongue out to brush it, or consider purchasing a tongue scraper.

如果你有呛喉的困扰，伸出舌头再刷它，或者考虑购买舌刮。

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Admittedly squeamish, I packed a tongue scraper so I could quickly flick them off, and I occasionally sought refuge on observation decks perched high in the rainforest canopy.

BBC: Malaysian Borneo on a single circuit