hgollow

例句：

1. 1. The old oak tree has a hollow heart that echoes the wind.
   那棵老橡树有一个空心的心，能回响风声。
2. 2.The hollow logs were used to make furniture in ancient times.
   古代用空心的木头制作家具。
3. 3. She sat down in the hollow of the rock and watched the sunset.
   她坐在岩石的凹处，看着日落。