在东秦岭前寒武系变质岩中，发育了许多Z字型叠加褶皱。它们是由近直立的片麻岩和长英质脉形成的。

Z-shaped superposed folds formed by nearly vertical gneiss and feldspar-quartz veins are widely developed in East Qinling Precambrian metamorphic rocks.

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我发现这棵桔树的其他枝条并没有长刺，和正常的桔树一样，只有一根枝条直立着长满了刺。

I have found in other citrus tree branches, and there is no long thorns, and normal citrus, only a straight forward branches covered with thorns.

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