Delta is also sometimes referred to as the " double mutant" .

Delta有时也被称为" 双突变体" 。

The move comes after Singapore found the double mutant variant of the coronavirus first detected in India among locally transmitted cases.

此前，新加坡在本土病例中发现了首次在印度发现的双变种冠状病毒。

And please stop calling it a " double mutant, " he says.

请不要再称它为“双重突变体”，他说。

The BBC and other media like calling it " the double mutant" because that sounds scary, and it has two mutations.

BBC 和其他媒体喜欢称它为“双重突变体” ，因为这听起来很可怕，而且它有两个突变体。