狄氏剂与艾氏剂有关,对蚯蚓的毒性是相似的.Dieldrin is related to aldrin, and its toxicity to earthworms is similar.艾氏剂和氯丹都是重要的杀虫剂.Both Aldrin and Chlordane are valuable insecticides....
花粉粒和雌蕊都具有活力.Both the pollen grains and the gynoecia are active.花粉粒富含线粒体 、 高尔基体以及内质网上.Pollen grains are rich in mitochondria, Golgi apparatus, and endoplasmic reticulum.显微观察可见,果中的刺球状花粉粒最为显著.We can see spinous pollen grain...
赛前他状态很好，赛后就筋疲力尽了。Before the race, he is fine. But afterwards he is worn out.那场展览陈述的想法很好，但是没能实现。The ideas in the show's presentation were good, but failed in execution.你不用担心我。我水性很好。You don't have to worry about ...