Je was op zoek naar: unexploded (Engels - Japans)

uxo is the military designation for unexploded ordinance.
uxoは、軍指定よ 不発弾のための

looks like the lieutenant here is standing on an unexploded mine.
中尉の足元に爆発物があるみたいなんだが

you were, after all, the only person who knew that there was an unexploded bomb in the wall.
壁の向こうに不発弾があることを 知っていたのは 君だけだからね

this is bigger than a rogue general and his unexploded ordnance. what don't i know?
例の不発弾より 厄介なことでは？

there's also the danger of unexploded bombs, so they reported it to the police and the area was taped off to keep people out.
不発弾の危険性もあることから警察に通報し、現場にテープを張って立ち入りを防いでいる。

it is strange that a cameraman heading for a war-zone should not know about the danger of unexploded shells. the newspaper company is being negligent in its training.
戦場に赴くカメラマンが不発弾の危険性を知らないのは不思議だ、新聞社は教育を怠ってる。