They are important and necessary feeding and breeding grounds for migratory birds.
他们是候鸟必不可少的觅食和繁殖地，十分重要。
To control and eradicate the exotic and invasive plant Spartina alterniflora is important and necessary for biodiversity conservation management.
控制和根除外来和入侵植物互花米草对生物多样性保护管理来说是重要和必要的。
It is both important and necessary to note this difference.
注意到这个差别是重要的和必要的。
It's known to all that they do an important and necessary job.
大家都知道他们干的是重要的并且是必要的工作。
It? S known to all that they do an important and necessary job.
大家都知道他们做的是重要的并且是必要的工作。
The battery is a very important and necessary part of a vehicle.
蓄电池是汽车种十分重要、必要的部件。
Thus it is very important and necessary to study iterative methods.
因此迭代法的研究是非常重要和必要的。
Thus, it is important and necessary to prevent the crime from source.
因此，从源头上预防玩忽职守犯罪不但非常重要，而且很有必要。
It is important and necessary that we should master a foreign language.
掌握一门外语对我们来说是重要的和必要的。
They wanted to make it clear that they did an important and necessary job.
他们想说明他们做着一项重要且必要的工作。
It is important and necessary that we (should) keep the balance of nature.
我们要维持生态平衡，这是重要而且必不可少的。
Tools are important and necessary, but they come and go as better tools come along.
工具很重要也很必要，但好工具层出不穷。
They ake it clear to the public that they are doing an important and necessary job.
他们要向公众表明，他们在做一件重要而又必要的工作。
When it comes to international trade, English is also very important and necessary.
当说到国际贸易时，英语也是非常重要和必不可少的。
They want to make it clean to the public that they do an important and necessary job.
他们要使公众明白他们做的是一项重要的而且必要的工作。
They want to make it clear to the public that they do an important and necessary job.
他们想向公众表明他们做的工作既重要又必要。
From the film, I have learned that being honest was extremely important and necessary.
从影片中，我懂得了诚实是相当重要和必要的。
They want to make it clear to the public that they are doing an important and necessary job.
他们要向公众表明，他们在做一件重要而又必要的工作。
On our way learning something, one of the most important and necessary factors is patience.
在我们求知的路上，最重要，必不可少的因素之一就是：耐心！
They want to make it clear to the public that they are doing an important and necessary job.
他们要向公众表明，他们在做一件必须做的重要工作。
It is important and necessary for construction enterprises to avoid commercial risk in a legal way.
规避经营风险是当今建筑施工企业必须重视和解决的重要课题之一。
Therefore, it is very important and necessary to strengthen research on theory and method about pay structure.
因此，加强对薪酬理论和薪酬管理方法的研究显得日益重要和迫切。
So the research of the stability of parameter excited system and its range of stability is very important and necessary.
所以，研究参数激励系统的稳定性及其稳定区域(范围)是很重要的。
The research on dynamic interaction between soil and ship locks with double-hinged soleplate is important and necessary.
对双铰底板式船闸闸室与土体的动力相互作用研究显得十分必要。
In the process of studying intrusion detection technology, the vulnerability taxonomy is an important and necessary process.
在进行入侵检测技术的研究中，安全漏洞分类是一个重要和必需的过程。
You should understand that business ethic, faithfulness and legality are very important and necessary for a General Manager.
您应该明白，商业道德和诚信及遵守法律，对总经理来说是不可或缺的。
We can say that neutron scattering is an important and necessary complement for X-ray diffraction and electronic diffraction.
中子散射可以说是对X射线衍射和电子衍射的一个重要的和不可缺少的补充。
Even though the future is important and necessary because it represents our hopes, dreams, and goals, it can be changed in an instant.
尽管未来是重要的也是必需的，因为它承载着我们的希望、梦想和目标，但是它也会在一瞬间改变。
Clouds are an important and necessary part of our environment, he notes, and anyway an endless succession of cloudless days would be boring.
云彩是自然环境重要且必要的组成部分，没完没了的晴朗少云天气总会让人感到厌倦。
Clouds are an important and necessary part of our environment, he notes, and anyway an endless succession of cloudless days would be boring.
云彩是自然环境重要且必要的组成部分，没完没了的晴朗少云天气总会让人感到厌倦。
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