There will be an unannounced inspection in the dorm rooms this week, be ready.
The product was released to the public this week, unannounced to the consumers.
There was no announcement when the enemy charged towards the castle.
抜打ち unannounced
今週、寮の部屋で抜き打ち検査が行われます。
There will be an unannounced inspection in the
dorm rooms this week, be ready.
この製品は今週一般に公開され、
消費者には発表されませんでした。
The product was released to the public this week,
unannounced to the consumers.
敵が城に向かって突進したときの発表はありませんでした。
There was no announcement when the enemy
charged towards the castle.
アメリカ合衆国 
