根系的英文：
root system
network of roots
descending axis

参考例句：
  • nematode damage to the soybean roots is characterized by coarse roots
    线虫破坏大豆根系的特征是:根系粗糙。
  • At maturity the root system is extensively nodulated.
    在成熟时，根系普遍具有根瘤。
  • The root system of the soybean consists of a taproot formed by the radicle
    大豆的根系包括由胚根形成的主根。
  • Roots of K-deficient plants are poorly developed and often affected by rot.
    罹病植株根系发育不良．常常腐烂。
  • At maturity the root system is extensively nodulated
    在成熟时，根系普遍具有根瘤。
  • Roots must have good aeration in order to function properly
    为了根系机能正常活动，必须有个良好的通气条件。
  • There is the potential of uptake of soil, inorganic nitrogen by the roots of the semi-parasite
    半寄生的根系有可能吸取土壤的无机氮。
  • Rhizogenesis--a morphogenetic event characterized by the appearance of root-bearing clumps of tissue--occurred
    根系发生--以出现带有成丛组织的根为特点的形态发生活动--产生了。
  • Tilth's the quality of a soil which makes it easy to cultivate and easy for the roots of plants to grow.
    耕性指的是使土壤易于耕作，根系易于生长的一种土壤性状。
  • Ground water also contains dissolved carbon dioxide from the air and from the exchange of gases in plant roots.
    地下水也含有溶解了的二氧化碳，这些二氧化碳是从空气和从植物根系的气体交换中获得的。
root是什么意思：
n. 根；根源；根基；词根；祖先
v. 生根；根源在于，来源于
  • nematode damage to the soybean roots is characterized by coarse roots
    线虫破坏大豆根系的特征是:根系粗糙。
  • These plants have very deep roots.
    这些植物的根长得很深。
  • Hope is the root of hopeful.
    hope是hopeful的词根。
system是什么意思：
n. 体系，系统；设备；制度；方法；身体；次序
  • Is the system unstable?
    是系统不稳定吗？
  • It was not a perfect system.
    它不是一个完美的系统。
  • This is a sexpartite system.
    这是一个由六部分组成的系统。
network是什么意思：
n. 广播网，电视网；网络；联络网
v. 通过（广播、电视网）联播；（电脑）联网
  • Networks for which these matrices are symmetric are called reciprocal networks
    如果一个网络，它的这些矩阵都是对称的，则把它称为可逆网络。
  • A Steering Committee of network partners is guiding development of the network.
    网络伙伴的指导委员会正在指导网络的发展。
  • Excellent interpersonal and networking skills.
    出色的与人交往能力。

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