Hi Yinan, they both have exactly the same meaning, that you are willing to do or try to do something. I would say that the UK English use up more and possibly the Americans use down more but they are completely interchangeable :)
3 maart 2021
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Heb je je antwoorden nog steeds niet gevonden?
Schrijf je vragen op en laat de moedertaalsprekers je helpen!