对此用英语怎么说

对此用英语怎么说：How to say this in English?

1. 我不知道如何用英语表达这个概念。I don't know how to express this concept in English.

2. 请问这个词怎么翻译成英语？Excuse me, how do you translate this word into English?

3. 我需要你的帮助，因为我对此不太熟悉。I need your help because I am not very familiar with this.

4. 对此我有一些疑问，能否请你解答一下？I have some questions about this, could you please answer them?

5. 我想了解更多关于这个话题的信息。I want to learn more information about this topic.