两面的

On both slopes of the roof there are broken tiles.

屋顶的两面斜面都有破瓦。

He writes on both sides of the sheet to conserve paper.

他在纸张的两面都写字以纸。

Utricles convex on both sides; rostra nearly equal to length of kernel; seed free from pericarp; leaves and bracts acicular to spinulose at apex.

胞果凸的两面；喙差不多等于珠心的长度；子离生的果皮；对具微刺的在先端针状的叶。