Instead of shedding as it gets colder, evergreens just drop a few leaves here or there all year while new ones grow in, kind of like how our hair grows on our heads.

常青树不是随着天气变冷而落叶，而是全年都会掉叶，同时也会由新的叶出来，有点像我们头顶的头发的生掉落过程。

Since water escapes the plant through the stomata, it's best for the plant to have them on the side of the leaf that does not get blasted by the sun all day.

由通过气孔从植物中逸出，所以最好将气孔叶的一侧，以免整天被太阳晒伤。

Its stem is covered with a smooth brown bark, and its green leaves have saw-like edges, somewhat like the leaves of a rose-bush.

茎干被一层光滑的棕色树皮包裹, 绿色的叶则有锯齿状边缘, 外形与蔷薇的叶相似。

The plant is popular because of its long, wavy leaves that grow upward from a fat, round base.

这种植物很受欢迎，因为它的而波状的叶从肥厚而圆的基部向上生。

Local people use the same plant-Dracaena cantleyi, an unremarkable-looking shrub with stalked leaves-to treat aches and pains.

当地人用同一种植物——龙血树，一种叶茎上的不起眼灌木——来治疗疼痛。

The sundew plant has long sticky leaves, which roll up after insects get stuck on them.

茅膏菜的叶又又粘，昆虫被困上边后，叶就会卷起来。

He sows some of it in his fields, and in a few weeks he sees long narrow leaves springing up, just like blades of grass.

有一些要播到农田里, 过几个星期, 就能看见又窄又的叶出来了, 跟草叶一样。

When the leaves come out, they are like large green hands, as you can see in the picture.

叶出来的时候，像一只只绿色的大手，就像图片里看到的这样。

And that happens every spring when the tree starts producing their leaves.

而且每年春天当树开始叶时就会发生这种情况。

Why did it make a bud before its leaves?

为什么它会叶之前先出花蕾？

One clue scientists discovered is that in the springtime when a tree is growing new leaves, it has to do a lot of hard work to make chlorophyll.

科学家发现的一个线索是， 春天树木出新叶时，它必须付出很大的努力来制造叶绿素。

A leaf is that thing that grows on a tree, maybe it looks like this, maybe it looks like this, maybe it looks like this.

叶是树上的东西， 也许它看起来像这样， 也许它看起来像这样，也许它看起来像这样。

A thousand secret whispers told him that newleaf was stirring in the cold earth, shooting up new green fronds and rousing the prey from its long leaf-bare sleep.

一千个秘密的低语告诉他，新叶正寒冷的土地上苏醒，出新的绿色叶，将猎物从期的光秃秃的睡眠中唤醒。

Because when a tree has no more leaves to grow, those they held the closest, and loved the longest, turn bright with life before they start to fall.

因为当一棵树没有更多的叶可以出来时，那些他们最亲近、爱得最久的树，它们开始落下之前就会变得生机勃勃。

In spring, trees grow back new leaves, and they look healthy again.

春天，树木重新出新叶，看起来又健康了。

They help those trees in our brain grow new leaves, but they don't make people hallucinate.

它们帮助我们大脑中的这些“树”出新的“叶”，但不会让人产生幻觉。

I looked at the flowers, which were blooming beautifully, with large petals and long green leaves.

我看着那些花， 它们开得很漂亮， 花瓣很大，叶又又绿。