To map 100 mutants by this method would necessitate nearly 5,000 crosses.用这种方法来绘制100个突变型的遗传图就要做5000个杂交.Earth crosses the orbit of Halley's Comet annually in October.地球和哈雷彗星的轨道将于每年的十月份交叉.All the morning wreaths and c...
The potato is a tuber plant.马铃薯是块茎植物.This is Bulbing, tuber formation, elongation.这就是球茎块茎的形成, 拔节.Amyloplasts are common in storage organs, e . g . the potato tuber.普遍存在于各类储藏器官中, 例如马铃薯的块茎中....
He was stricken at twenty-one with a crippling malady.他21岁时突患致残重疾。They both suffered from crippling pains in their hips.他们俩都感到髋部疼痛难忍。Arthritis and rheumatism are prominent crippling diseases.关节炎和风湿病是会严重损害身体健康的主要疾病。...