v.挖洞( hollow的过去式和过去分词 );挖空(某物),挖出(孔、洞);
例句:
The mule's back was hollowed by the weight of its burden.
骡背被重负压得塌下了。
They hollowed out a tunnel through the mountain.
他们挖通了穿山隧道.
They hollowed out a log.
他们把一根原木挖空.