求翻译：我的父母出差要到下个星期才回来，我的爷爷又生了病，需要我去照顾他。再说数学考试即将来临，我要好好的学习。所以，我不能去参加你的生日宴会，我感到非常抱歉。是什么意思？

My parents travel to the next week before I came back, my grandfather gave birth to a disease, I need to go take care of him. Besides the math exam is approaching, I have to carry the study. So, I can not go to your birthday party, I am very sorry.

My parents travel to come back until the following week, my grandfather was sick, I need to take care of him. Besides math exam coming up, I want to make good learning. So, I am not going to participate in your birthday party, I was very sorry.

正在翻译，请等待...

Traveling to my parents to come back until the next week, my grandpa was ill and wanted to take care of him. Math test coming, I will learn. So, I can't come to your birthday party, I am very sorry.

My parents travel on official business want only then to come back to the next week, my grandfather fell ill, needs me to look after him.Also mathematics takes a test coming soon, I must the well study.Therefore, I cannot attend your birthday banquet, I felt was sorry extremely.