They expect to come into a lot more money as their elderly relatives die off.随着年长的亲戚相继去世, 他们期望继承更多的钱财。

The bamboos flower and then die off.竹子开花后相继死亡。

Most of the cells die off too quickly to do any good.大多数细胞还未发挥作用就很快相继死亡。