single tuned circuit

例句：

1. 1.The single-minded focus on the project is commendable.
   对这个项目一心一意的关注是值得赞扬的。
2. 2. He has a single friend in his life.
   他一生中只有一个朋友。
3. 3.The single woman was left alone to care for her child.
   这位单身母亲独自照顾她的孩子。