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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；
热门例句
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。
相关例句
Some higher officials attended the celebration rally.
一些高级官员参加了庆祝大会。
The club will hold a party to celebrate its centenary.
这个俱乐部要举行庆祝成立一百周年的活动。
The catch on this door is broken.
这扇门上的吊扣坏了。
She obeyed and cautiously opened the door.
她服从了,并小心地开了门。
Putting on a hat can be a ceremonious act, an elegant gesture in the ritual of dressing.
戴帽子被看作一种礼节性的举动，是着装仪式上一个优雅的举动。
They cast their plan in great detail.
他们非常具体地制订了计划。
I could hardly catch what he meant.
我简直不理解他说的意思。
Put the chicken pieces in a casserole.
把鸡块放到砂锅里。
I could see a large stone casket with a knight in armor lying on the lid.
我看见一个全副武装的骑士躺在石棺盖上。
This type of china is rather hard to categorize,it’s very unusual.
这种瓷器非常特殊,很难归类。
She recited a catalogue of her husband's sins to me.
她向我历数了她丈夫的一连串罪过。
The flood was a major catastrophe.
洪水是一场大灾难。
The child's headache may be caused by stress.
那孩子的头痛可能是紧张引起的。
We are certain that he will get over his illness.
我们相信他一定会战胜病魔的。