As you can see, along the length of the hair, there are three main parts called the bulb, the root and the shaft.
如你们所见，顺着头发的长度可以分为三个主要部分，分别是毛囊、毛根和毛干。
The root length is main parameter of root architecture with various important functions such as nutrient uptake, drought tolerance and yield.
而根的长度是根型的主要参数，对于养分的吸收，耐旱和作物的产量都有重要的作用。
According to the experiment of growing blood wood seedling by cuttimg, the main factors that influence the heigh, the length of root and the number of roots of blood wood seedlings are different.
根据扦插育苗试验表明，影响泰国赤桉苗高、根长及发根数的主要因素各不相同。
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