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- Only a few forest tree species can develop viable seed from unpollinated ovules. 只有少数林木可以从未授粉的胚珠发育成有活力的种子。
- Since that time an effort has been made to catalog the characteristics of each introduction and maintain viable seed. 从那时以后，对编录每个引入材料的特性和保持有生活力的种子作了一定努力。
- Seed storage is necessary to provide an annual supply of viable seed for reforestation and for preservation of germplasm for gene conservation. 摘要为了每年提供造林新需的具有生活力的种子及长期保存种质资源，贮藏种子是必要的手段。
- JASON WILLIAMS: The plant has the amazing ability to germinate, grow and within six months produce viable seeds. 这种植物具有惊人的存活能力,可在六个月内大量繁殖和生长。
- It is necessary to investigate the sources and purity of pollens on stigma and to determine whether they are related to the ability of producing viable seeds of Liriodendron chinense. 通过比较分析，认为有必要对落在柱头上的花粉来源和花粉纯度及这些指标与结实率之间的关系做进一步研究。
- Only a few forest tree species can develop viable seed from unpollinated ovules 只有少数林木可以从未授粉的胚珠发育成有活力的种子。
- The chef sprinkle poppy seed on the cake. 厨师往蛋糕上撒罂粟籽。
- Part of every crop is saved for seed. 每一种庄稼都留一部分作种子。
- The farmers were scattering seed on the fields. 农夫把种子撒在田里。
- Bursting apart, as some seed pods when ripe. 爆裂的，如一些荚果成熟时
- Temperature is most important for seed germination. 温度对种子的发芽至关重要。
- The seed has a hard exterior covering. 这种子外壳很硬。
- The seed of a fleshy fruit; a pip. 籽，种子肉质水果的种子; 籽
- The economy of the country is not viable. 这个国家经济是难以维持的。
- He started to drink too much and gradually ran to seed. 他喝酒过多，身体逐渐衰弱了。
- viable seed 可育性种子
- Do you know about the evolution of a seed into a plant? 你知道从种子发展成为植物的过程吗？
- This plan wouldn't be viable in practice. 这项计划在实际情况中不会行得通。
- An aging Romeo stepped out of the car, grey, pale and gone to seed. 一位年长的罗密欧步出车来，头发花白，面色苍苍，毫无魅力。
- The factory is no longer economically viable. 这个工厂已没有经济效益了。
