一半 one half; half; in part: 一半以上 more than half 另一半 the other half 减少一半开支 cut down the expenditure by half 现在付一半，剩下的以后再付。

Pay half now and the rest later. 四的一半是二。

Half of four is two. 这些书中有一半是小说。

Half of the books are novels.