single timing axis

例句：

1. 1. The single treein the park is my favorite spot tosit and read.
   公园里那棵唯一的树是我最喜欢的坐下来阅读的地方。
2. 2. He hasa single friend who he trusts completely.
   他只有一个完全信任的朋友。
3. 3. Sheis a single mother raisingher two children alone.
   她是一个单身母亲，独自抚养两个孩子。