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我无法确切说出他是谁。用英语怎么说？

我无法确切说出他是谁。

I am not certain who he is.

相关词汇
am not certain who he is

am

abbr. (=amplitude modulation) <无>调频，调谐；vi. （用于第一人称单数现在时）是；aux. （与v-ing连用构成现在进行时，与v-ed连用构成被动语态）；

not

adv. 不，[用以表示否定、否认、拒绝、禁止等]不是，几乎不，未必，没有[用于否定后面的词或短语]；

certain

adj. 某一，必然的，已确定的；pron. [动词用复数]某些；

who

pron. 谁，什么人，关系代词，有先行词，孰；

he

pron. 他，它，一个人；n. 雄性动物；

is

vt.& vi. 是（be的三单形式；n. 存在；
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He acknowledged publicly that he might have made a mistake.
他当众承认自己可能犯了个错误。
...the spiralling vortex airflow that slows the plane.
使飞机减速的螺旋形气流涡旋
You just go on ahead. I'll come by later...
你只管先往前走。我随后就来。
He who spares his rod hates his son, But he who loves him chastens him early.
24不忍用杖打儿子的,是恨恶他;疼爱儿子的, 趁早管教.
For further information, please contact 414 3925, extension 2253.
详情请致电414 3925,转分机2253。
Baroness Thatcher's claims seem credible to many.
撒切尔女男爵的主张在很多人看来是可信的。
He sat there while I made the case for his dismissal...
他坐在那儿，听我陈述解雇他的理由。
Nothing to be got without pains but poverty.
一份耕耘，一份收获。
This decree obliges unions to delay strikes.
该法令迫使工会推迟罢工。
The right to demand payment from the endorser of a commercial paper when the first party liable fails to pay.
追索权当有支付义务的第一方不能支付时，可以向商业票据的背书人要求支付的权力。
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The club was constituted to cater the young's taste
这个俱乐部是为满足年轻人品位而设立的
This is the central city of the whole area.
这是整个地区的中心城市。
He casually flicked away some dust from his jacket.
他漫不经心地把夹克上的灰拍掉。
His black cassock was dusty and sweat-stained.
他黑色的袍子上尽是尘土，汗渍斑斑。
I could hardly catch what he meant.
我简直不理解他说的意思。
Caroline dug up a head of celery.
卡罗琳从地里挖出一棵芹菜。
Could you catch her meaning?
你明白她的意思吗?
The 5th century saw the end of the Roman Empire in the West.
古罗马帝国灭亡于五世纪。
Put the chicken pieces in a casserole.
把鸡块放到砂锅里。
The bank was carefully cased by the bandits before the robbery.
银行在抢劫案发生之前曾被匪徒彻底勘查过。
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有头颅指数低于75的、相对长些的头部
We are certain to be victorious.
我们定会胜利。
Each pack contains a book and accompa-nying cassette.
每包内装书一本,并附盒式磁带。
castors under an armchair
扶手椅下的脚轮