英语语法分析

Vessel and fibre - tracheid are both spiral thickening distinctly.

导管与纤维管胞均具明显的螺纹加厚。

Genetic variations on tracheid microfibril Angle of 55 Chinese fir clones were investigated.

对55个杉木无性系管胞微纤丝角的遗传变异进行了研究。

There were very small effect of seed source and no definite geographic pattern in tracheid length.

管胞长度的种源区和产地效应很小，无一定的地理变异趋势。