将一节竹子劈去一半就成了风叶，把竹子的末端做成向下的倾角，这样灯光就能向下照射为路人照明，也能从远处看到。

The windblades come to existence by cutting the bamboos into halves. The ends of the bamboos are cut angularly so the lamp lights downwards to the passer-bys and its motion can be seen from afar.

youdao

要减少这些影响，我们可以只在需要时才使用灯光，使灯光向下直射，并且对户外照明加以控制。

To Janrease these effects we can use lights only when needed, direct lights down, and put controls on outdoor lighting.

youdao