How to say a 'broadcaster' in online live video? There are some people give online live videos range from interesting things in their life to games.Many of them work for this as a job and can earn a lot of money and some of them are very famous on the internet. Which word or phrase should I use to describe these sort of persons especially to those well-known ones . Thanks a lot if you could help.

A meaning of 'over' I read a title of an article like 'New Jersey couple sues to raze house over creepy letters' . Its main content is that the couple sued the local goverment because it reject their bid to demolish their house, they said they have been hounded by a stalker for many years. I am not sure about the meaning of 'over' in the title. Does it means 'against' or 'because of' in this context ? Plz help me ,thanks.

What the different between 'related' and 'relating' Some materials relating to primary education. Some materials related to primary education. Are there some differences? Thanks.

Whether we should contact to alien? This is an IELTS writing topic, I would like someone to correct it for me. If you have some problems in Chinese learning I would like to help too.Thanks. As some scientists suggest, there might be some civilizations in other planets.There are two different opinions about whether we should try to communicate with these intelligent creatures. Some scientists tend to find some way to contact these aliens because they believe that it would be helpful for the development of science and technology.Scientific theories and the understanding of the cosmic from other civilizations could be pretty different from ours, because of this, we could benefit from the communications. It is possible to have some cooperations in the scientific research with these aliens. Secondly, we might get some assistance from these aliens to overcome some serious problems we suffer from. For instance, the environmental problems and the excessive consuming of natural resource, we might gain some solutions from them. On the other hand, some scientists argue that the alien civilization could take us disasters. They would be liable to invade the earth to gain a new colony, especially if they had a more advanced science level than ours. To say the least, it would be other problems even if they just want to have cooperations with us instead of invasions. For example, there would be immigrant from other planets, which will increase the consuming of resource and take us some new diseases. Overall, it would be an inevitable problem we have to face if there were other intelligent creatures in the cosmic. It would not be helpful to avoid contacting other civilizations because they would be able to find us in the future. It is better for us to find them, understand them and cooperate with them actively.

Tips on Chinese listening skill I am going to tell you about some useful tips about improvement in listening skill , in fact , it's not a new way and many people have some experience in this method but failed to get benefit from it. This method is watching cartoons. There are no secrets about it , but you must be able to choose the right materials whose contents cover as many aspects in common sense as possible. As you are all familiar with these pieces of knowledge ,It will be easy for you to understand the cartoon's main idea.You don't need to learn the common sense but you have to learn the way people talking them in Chinese. Don't choose retarded cartoons ,they are used for children to kill time```. Strong recommendation : '海尔兄弟 二十周年纪念版'. It is a verson with subtitle. The cartoons 's aim is to teach children knowledge about nature ,science ,daily life and so on. In addition , the subtitle is really important . Hope this advice could help you.

Tips on Chinese listening skill

I am going to tell you about some useful tips about improvement in  listening skill , in fact , it's not a new way and many people have some experience in this method but failed to get benefit from it. 

This method is watching cartoons. There are no secrets about it , but you must be able to choose the right materials whose contents  cover as many aspects in common sense as possible. As you are all familiar with these pieces of knowledge ,It will be easy for you to understand the cartoon's main idea.You don't need to learn the common sense but you have to learn the way people talking them in Chinese. Don't choose retarded cartoons ,they are used for children to kill time```.

Strong recommendation : '海尔兄弟 二十周年纪念版'. It is a verson with subtitle. The cartoons 's aim is to teach children knowledge about nature ,science ,daily life and so on.  

In addition , the subtitle is really important .

Hope this advice  could help you.