a great while

• 许久；很久

a great while的用法和样例：

例句

1. We have talked the problem over for a long time.
   这个问题我们已商量许久了。
2. Such notions have been around a lot longer than scary movies.
   这种观念在恐怖电影出现之前便已流传许久。
3. He had a long bout of illness last year.
   他去年生了一场拖了很久的病。
4. Fruit juices ferment if they are kept a long time.
   果汁若是放置很久，就会发酵。