求翻译：在你离开之前我们不能见面了 因为我奶奶生病了 在家里照顾她 但是当你再次来北京的时候一定要给我打电话是什么意思？

Before you leave, we could not meet because my grandmother is sick at home and take care of her, but when you come to Beijing again when you want to call me