He passed it off as a genuine diamond.

Her wedding ring be make of genuine diamond.

她的结婚戒指是用真正的钻石做的。

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It's 1885 and New York City has a big problem.

1885年，纽约面临一个大问题

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This is big problem we must work out.

这是很大的问题。我们必须制定。

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We would not have to face this big problem.

我们不得不面对这个大难题。

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That's going to be a big problem for her.

这对她来说会是一大难题。

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Water quality is also a big problem.

水的质量也是一个大问题。

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Pollution is a big problem.

污染是个大问题。

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Body image – the way people feel about their looks – is a big problem for many young people today.

身体形象即人们对自己外表的感觉，是当今许多年轻人面临的一大问题。

中考真题- 2019 江西 完形填空

Stress is a big problem for gamers.

压力对于游戏玩家来说是个大问题。

中考真题- 2019 江西 阅读C

Another big problem is mechanical failure.

另一个大问题是机械故障。

中考真题- 2019 贵州 阅读B

Many people know that rubbish is a big problem on planet Earth.

许多人都知道垃圾是地球上的一个大问题。

中考真题- 2018 广州 阅读C

It's no secret that air pollution is a big problem for China.

空气污染对中国来说是个大问题，这已不是什么秘密。

中考真题- 2019 武汉 阅读B

But how to get water was a big problem.

但如何取水是个大问题。

中考真题- 2016 陕西 阅读B

How is NASA overcoming this very tiny big problem?

美国宇航局是如何克服这个微小但影响巨大的问题的？

高考真题- 2019 全国2卷 阅读D

I realised I had a big problem. I wanted to be all things to all people

我意识到我有个大毛病，我总想不得罪任何人。

柯林斯高阶英汉双解学习词典

Pollution is a big problem to be solved.

污染是一个有待解决的大问题。

外研社英语同义词辨析词典

Determination and Analysis of 3 ′ Untranslated Regions of 4 Strains of SARS Coronavirus Isolated in China

4株SARS冠状病毒中国分离株3′非编码区的序列测定及分析

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Construction of DNA vaccine encoding the small envelope protein of SARS coronavirus and the experimental immunization study in mice

SARS冠状病毒E蛋白DNA疫苗的构建及其实验免疫研究

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SARS coronavirus IgG was positive in 7 mothers and 4 infants.

产妇冠状病毒抗体IgG均阳性，婴儿4例阳性、3例阴性；

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Over-expression and purification of recombinant spike protein fragment of SARS coronavirus

重组SARS-CoV刺突蛋白基因片段的原核表达及纯化

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