主组分 meaning in Chinese

main constituent
major constituent

The results show that the compositional distributions along the thickness of the w - mo - ti fgm are in fair agreement with the designed values , and the element distributions along the vertical direction of the thickness are almost the same respectively . the w - mo - ti fgm also reaches the full density under the certain conditions
结果表明：制备得到的w - mo - ti功能梯度材料表现出良好的梯度分布和平整性，在厚度方向上的主组分的分布与设计要求基本一致，在垂直厚度方向上各组分的分布基本相同。