吃透英语课本，提升在校竞争力
n. 零；没有
复数：noughts
A billion is 1 with 9 noughts after it.
十亿是1后面加9个零。
All our efforts were for nought.
我们所有的努力都白费了。
come to nought
一事无成，失败
n.[数]零；没有
absence
nothing
