This is big problem we must work out.

We would not have to face this big problem.

我们不得不面对这个大难题。

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

这对她来说会是一大难题。

Water quality is also a big problem.

水的质量也是一个大问题。

Pollution is a big problem.

污染是个大问题。

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。

Stress is a big problem for gamers.

压力对于游戏玩家来说是个大问题。

Another big problem is mechanical failure.

另一个大问题是机械故障。

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。

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。

But how to get water was a big problem.

但如何取水是个大问题。

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？

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。

Pollution is a big problem to be solved.

污染是一个有待解决的大问题。

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

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

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；

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

Genomic Characterization of SARS Coronavirus: A novel Member of Coronavirus

冠状病毒的新成员&SARS-CoV的基因组特性

Objective: To establish a cell model of SARS coronavirus ( SARS-CoV) in Guangdong.

目的：建立中国广东地区SARS-CoV细胞培养模型。

Preliminary Study of Inactived SARS Coronavirus Vaccine Experimental Immunity

SARS灭活疫苗的实验免疫初步研究