1. It makes you feel good to help others. （此处汉语的“更”是个虚词,不必翻译）
2. Everything is a double sward. So are Industrial factories. when factories are bringing people wealth, they are creating air pollution, water pollution, and other harms as well. This makes it a priority to protect the environment when we are developing the industry. (这句汉语也不漂亮,象初中生作文——勉强翻译吧)
3. He has to be busy with his endless homeworks all the time.
4. What he is doing doesn't belong to the speakable.
或者 What he is doing is unspeakable.
5. Just the same as his parents, Li Tong likes playing tennis very much.
（怎么有些网友在用机器翻译呢?机器翻译很难精准的）