英语语法分析

Trading was important, as so many raw materials, the semiprecious stones for the decoration of the temples, timbers for roofs, and all metals, had to be imported.

由于大量原材料，如用于装饰庙宇的半宝石石料、建造屋顶的木材和所有金属都需要进口，贸易变得至关重要。

As so often is the case, stating that principle doesn't ease the challenge of line-drawing.

通常情况下，声明那一原则并不能减轻越界的挑战。

As so often before, the gay children dragged him from his tree.

和往常一样，快乐的孩子们把他从树上拽下来。