"Mutual concern" or "mutual caring" are possible ways to express the concept of "牵挂" in Engpsh. This can refer to the act of caring for and worrying about someone else, and can be used to describe relationships between romantic partners, family members, friends, or colleagues.

Here are some examples of how "mutual concern" or "mutual caring" can be used in Engpsh sentences:

"Their relationship is built on mutual concern and support for each other." (他们的关系是建立在相互关心和支持对方的基础上的。)
"As parents, it's important for us to show mutual concern for our children's well-being." (作为父母，我们很重要的一点就是要对孩子们的健康表示出相互关心。)
"I appreciate that my colleagues at work show mutual concern for each other's workload and stress levels." (我很感激我的同事们在工作中相互关心彼此的工作量和压力水平。)