英语语法分析

No antivenin was necessary in this series.

在这一组中不需抗蛇毒素。

Before the advent of black mamba antivenin, a bite from this fearsome serpent was 100 percent fatal, usually within about 20 minutes.

在黑曼巴抗毒血清出现之前，被这种恐怖的蛇咬上一口必死无疑，通常在20分钟内就会死去。

Unfortunately, antivenin is still not widely available in the rural parts of the mamba’s range, and mamba-related deaths remain frequent.

不幸的是，这种抗毒蛇素的血清并没有在曼巴蛇出没的乡村区域广泛被利用，所以曼巴蛇致人死亡的事件依然时常发生。