immediate family member

基本解释

Mohamad Kabir sits in front of his makeshift shelter with his only surviving immediate family member, his son, Wajid.
Mohamad Kabir坐在他的臨時住所前，和他在一起的是他的兒子Wajid，也是他唯一幸存的直系家人。
The mentor could not be an immediate family member or live in the youth's home and had to be at least five years older.
這些精神導師可能竝不是青年人家庭中的一員，也不需要和青年居住在一起，但是要求必須比青年人至少年長5嵗。
An immediate family member (parent, sibling), friend, or someone with whom you're romantically involved may be under stress and require your help.
直系親屬（父母，兄弟姐妹），朋友或愛人在一起，就是你在愛情上，可在壓力下，需要你的幫助。

Six years ago, my younger brother Peter, who was my closest friend and the only remaining member of my immediate family, ended his life.
NPR: Living in the Here and Now