double diploid

例句：

1. 1. The double diploid is a rare species that can only be found in certain regions of the world.
   双倍二倍体是一种稀有物种，仅能在世界的特定地区找到。
2. 2.The triploid is a plant with three sets of chromosomes, which makes it more resilient to environmental stresses.
   三染色体植物比正常的二倍体植物更能抵抗环境压力。
3. 3. The tetraploid is a plant with four sets of chromosomes, which means it has twice as many chromosomes as a normal plant.
   四染色体植物有四套染色体，这意味着它的染色体数量是普通植物的两倍。