At least 300 civilians are unaccounted for after the bombing raids.

遭轰炸袭击之后，至少有300名平民下落不明。

《牛津词典》

In the story he gave the police, half an hour was left unaccounted for.

他对警察的陈述中有半个小时的事情未交代清楚。

《牛津词典》

5,000 American servicemen who fought in Korea are still unaccounted for.

5000名曾在朝鲜打仗的美国军人仍下落不明。

《柯林斯英汉双解大词典》

But that figure could rise dramatically, as some 150 personnel are still unaccounted for nearly 48 hours after the quake.

VOA: standard.2010.01.14

The United Nations said there was serious damage to the headquarters of its mission in Haiti, and a large number of staff were unaccounted for.

VOA: standard.2010.01.13

Reports indicate the nation is considering imposing sanctions on Serbia if the pilots remain unaccounted for.

CNN: Clinton reiterates troops will leave after a year

There are no reports of missing persons or people unaccounted for, the police said.

WSJ: About 35 Hurt in Prague Gas Blast

Hundreds were killed and many more are unaccounted for following attempts to violently suppress the uprising.

BBC: Egypt army 'tortured and killed during 2011 revolution'