0 having two sets of chromosomes (= structures containing chemical patterns that control what a plant or animal is like), one from each parent -- 二倍的,二倍體的(具有兩套分別來自父體和母體的染色體)
a diploid cell 二倍體細胞
We can complete it step by step however long the road is and it can't be completed however short the road is if you don't even mark your footprint.
再长的路,一步步也能走完,再短的路,不迈开双脚也无法到达。