On city grounds, they are planting baby giant sequoias, just a few centimeters tall.

在城市的土地上，他们正在种植只有几厘米高的巨型红杉幼苗。

And our last time with the giant sequoias.

最后讲巨杉。

The giant sequoias are not native to the Pacific Northwest area.

巨型红杉并不是太平洋西北地区的原产树种。

The fast moving wildfire that's threatening giant sequoias in Yosemite National Park has burned at least 6.7 square miles.

快速蔓延的野火对约塞米蒂国家公园的巨型红杉正造成威胁，现已烧毁至少6.7平方英里的土地。

Four giant sequoias, known as the Four Guardsmen, were unharmed.

四棵被称为“四卫士”的巨型红杉安然无恙。

After decades of pressing forest fire, other trees and brush have grown rampantly around the sequoias.

经过几十年的森林大火，红杉周围的其他树木和灌木丛迅速生长。

One possible solution would be to cut down less important species of trees that compete with sequoias for water.

一种可行的办法就是减少非重要树种的数量，增加红杉的需水量。

Precisely zero sequoias, and he learned how to climb trees today.

准确的说是一点也没爬，他今天学会了爬树。

The threat made worse by another year of drought, leaving the sequoias dry and vulnerable.

又一年的干旱加剧了这种威胁，导致红杉树干燥脆弱。

So far, there have been no reports of damage to the sequoias.

到目前为止，还没有红杉受损的报告。