under bark

Every year the stem of the oak-tree becomes a little thicker, for a new layer of wood grows all round it just under the bark.

每年，橡树的茎干都会变得更粗，因为树皮之下长出了新的一层木头。

In addition, ecotypic differentiations in leaf area, specific leaf area, bark, height under branch and crown width were found between hilltop and foot gulch in the studied species.

另外，在山顶和山脚调查的几个种群在叶面积、比叶面积、树皮、枝下高和冠幅等方面，均出现了生态型的差异。

All the species collected from forest region, which live under bark, on dead twigs and branches or under leaf litter, feeding on fungal spores.

这些种均采自林区，生活于树木表皮缝隙间或枯死的林木树叶、树皮下取食真菌孢子。

Some Negroes advanced in a bark under the balloon.

在气球下面有几个黑人划着一只小船.

The response of wood/ bark properties of red birch seedlings to elevated CO2 ( EC) under low ( LD) and high density ( HD) were investigated in closed top fumigation chambers ( CTC).

研究了高（HD）、低（LD）两个种植密度下红桦幼苗的树皮和去皮树干特征对CO2升高的响应。