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。