Translation:Would you like to try it?
It's all context; if this phase is used to talk about trying some food or drink, then the English might be "would you like to try a bit/ some/ a sip etc. But in English you "try on" clothing or you might "try out" a toy or some device like a bottle opener - all can be "试一下", so all should really be accepted by Duo.
to try out | to attempt试 ( shi / shì ) belongs to the 1000 most common Chinese characters (rank 731)
Chinese example words containing the character 试 ( shi / shì )
考试 ( kăoshì = examination ), 试验 ( shìyàn = test )
Other characters that are pronounced shì in Chinese
世 (generation) , 事 (affair) , 势 (strength) , 士 (scholar) , 室 (room) , 市 (city) , 式 (type) , 是 (to be) , 柿 (persimmon) , 示 (to show) , 视 (to look at) , 逝 (to die) , 适 (to suit) , 释 (to explain) , 饰 (decoration)
More words that mean to try in Chinese
shĕn ( 审 ), shìyàn ( 试验 )
More words that mean to test in Chinese
kăo ( 考 )