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

參考例句：
  • nematode damage to the soybean roots is characterized by coarse roots
    線蟲破壞大豆根系的特征是:根系粗糙。
  • At maturity the root system is extensively nodulated.
    在成熟時，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.
    罹病植株根系發(fā)育不良．常常腐爛。
  • At maturity the root system is extensively nodulated
    在成熟時，根系普遍具有根瘤。
  • Roots must have good aeration in order to function properly
    為了根系機能正常活動，必須有個良好的通氣條件。
  • 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無機氮。
  • Rhizogenesis--a morphogenetic event characterized by the appearance of root-bearing clumps of tissue--occurred
    根系發(fā)生--以出現帶有成叢組織的根為特點的形態(tài)發(fā)生活動--產生了。
  • 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，根系易于生長的一種土壤性狀。
  • 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，這些二氧化碳是從空氣和從植物根系的氣體交換中獲得的。
root是什么意思：
n. 根；根源；根基；詞根；祖先
v. 生根；根源在于，來源于
  • nematode damage to the soybean roots is characterized by coarse roots
    線蟲破壞大豆根系的特征是:根系粗糙。
  • These plants have very deep roots.
    這些植物的根長得很深。
  • Hope is the root of hopeful.
    hope是hopeful的詞根。
system是什么意思：
n. 體系，系統(tǒng)；設備；制度；方法；身體；次序
  • Is the system unstable?
    是系統(tǒng)不穩(wěn)定嗎？
  • It was not a perfect system.
    它不是一個完美的系統(tǒng)。
  • This is a sexpartite system.
    這是一個由六部分組成的系統(tǒng)。
network是什么意思：
n. 廣播網，電視網；網絡；聯(lián)絡網
v. 通過（廣播、電視網）聯(lián)播；（電腦）聯(lián)網
  • Networks for which these matrices are symmetric are called reciprocal networks
    如果一個網絡，它的這些矩陣都是對稱的，則把它稱為可逆網絡。
  • A Steering Committee of network partners is guiding development of the network.
    網絡伙伴的指導委員會正在指導網絡的發(fā)展。
  • Excellent interpersonal and networking skills.
    出色的與人交往能力。

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