We use vinegared rice to stop the sushi from drying out and going off.
We use vinegared rice when we make sushi to stop the fish from drying out and spoiling.
「寿司には乾燥と傷み防止のため、酢飯を使う」= We use vinegared rice to stop the sushi from drying out and going off. / We use vinegared rice when we make sushi to stop the fish from drying out and spoiling.
ボキャブラリー
use = 使う
vinegared rice = 酢飯
to stop/to prevent = ~防止のため
dry out = 乾燥する
go off/spoil = 傷む
when we make sushi = 寿司を作る時
To prevent the rice from getting dry and going bad.
この場合、次のような言い方ができますよ。
A: Why do people use vinegar flavoured rice when they make sushi?
「寿司を作る時、なんで酢飯を使うの?」
B: To prevent the rice from getting dry and going bad.
「お米が乾燥したり、傷んだりするのを避けるためだよ」
to get dry「乾燥する・乾く」
to go bad「腐る・傷む」
ご参考まで!