Thank your invitation.I would like to join in your birthday party.But my mother is ill, I have to look after her, I could notjoin in your birthday party.It'sa pity not to take part inyour birthd...能给我翻译一下中文吗谢谢你的邀请，我本打算去，可妈妈病了，我必须照顾她。真遗憾不能在你的生日派对上祝福你生日快乐。抱歉只能写信祝你生日快乐。我已准备了生日礼物，我打算用特快专递寄你。我想说，生日快乐，汤姆！