Nonfouling
未污染的, 未弄脏的, 无污垢的, 无污泥的
🗣️ 情景例句
Nowadays many young people cohabit together without legal permission.
如今很多年轻人未获得法定允许就一起同居了。
Better say nothing than nothing to the purpose.
与其说话不中肯，不如一言不发好。
and for several days will probably refuse all food through anger and fear.
甚至一连几天由于愤怒和恐惧而拒绝进食。