TED演讲:树木之间如何交流(4)
时间：2019-01-18 作者：英语课 分类：TED演讲科学篇
英语课
The first day of the experiment, we got out to our plot 实验的第一天，我们来到了实验地点，
and a grizzly 1 bear and her cub 2 chased us off. 突然一头灰熊和她的熊宝宝出现，把我们赶跑了。
And I had no bear spray. But you know, this is how forest research in Canada goes. 然后我还没带防熊喷雾剂。但你知道吗，在加拿大做森林研究其实就是这样的。
So I came back the next day, and mama grizzly and her cub were gone. 所以第二天我又回来了，灰熊妈妈和熊宝宝没在。
So this time, we really got started, and I pulled on my white paper suit, 这一次我们可以真正开始实验了，我穿上我的白纸套装工作服，
I put on my respirator, and then I put the plastic bags over my trees. 带上呼吸器，然后给我的树都罩上了塑料袋。
I got my giant syringes, and I injected the bags with my tracer isotope 3 carbon dioxide gases, first the birch. 我拿出我那些大注射器，往袋子里面注入了含有示踪同位素的二氧化碳气体，首先是纸皮桦。
I injected carbon-14, the radioactive gas, into the bag of birch. 我往罩纸皮桦的袋子里面打入了有放射性碳14的气体。
And then for fir, I injected the stable isotope carbon-13 carbon dioxide gas. 然后是花旗松，我往他们的袋子中注射了含有稳定性同位素碳13的二氧化碳。
I used two isotopes 4, because I was wondering whether there was two-way communication going on between these species. 我用了两种同位素，因为我不知道这两种树之间的交流是否是双向的。
I got to the final bag, the 80th replicate 5, and all of a sudden mama grizzly showed up again. 当我走向最后一个袋子时，也就是第80棵样本，突然间那头灰熊妈妈又出现了。
And she started to chase me, and I had my syringes above my head, 然后她开始追我，我把我们的那些注射器举过头顶，
and I was swatting the mosquitos, and I jumped into the truck, 扑打着周围无数的蚊子，然后跳上了卡车，
and I thought, "This is why people do lab studies." 然后我想，“这就是为什么人们喜欢在实验室做实验的原因吧。”
I waited an hour. I figured it would take this long for the trees to suck up the CO2 through photosynthesis 6, 我等了一小时。我觉得这个时间差不多可以让那些树通过光合作用吸收二氧化碳，
turn it into sugars, send it down into their roots, 转换生成糖，再把糖送到它们的根，
and maybe, I hypothesized, shuttle that carbon belowground to their neighbors. 然后也许，我也是猜测，把那些碳元素从地下传给它们的邻居。
adj.略为灰色的，呈灰色的；n.灰色大熊
- This grizzly liked people.这只灰熊却喜欢人。
- Grizzly bears are not generally social creatures.一般说来，灰熊不是社交型动物。
n.幼兽，年轻无经验的人
- The lion cub's mother was hunting for what she needs. 这只幼师的母亲正在捕猎。
- The cub licked the milk from its mother's breast. 这头幼兽吸吮着它妈妈的奶水。
n.同位素
- The isotope ratio is directly used for comparing oils or gases.同位素比率直接用于比较各种石油或天然气。
- How to apply a radio isotope?如何运用放射性同位素？
n.同位素；同位素( isotope的名词复数 )
- the many isotopes of carbon 碳的诸多同位素
- Tritium is one of the mildest radioactive isotopes. 氚是最和缓的放射性同位素之一。 来自《简明英汉词典》
v.折叠，复制，模写；n.同样的样品；adj.转折的
- The DNA of chromatin must replicate before cell division.染色质DNA在细胞分裂之前必须复制。
- It is also easy to replicate,as the next subsection explains.就像下一个小节详细说明的那样，它还可以被轻易的复制。
n.光合作用
- In apple trees photosynthesis occurs almost exclusively in the leaves.苹果树的光合作用几乎只发生在叶内。
- Chloroplasts are the structures in which photosynthesis happens.叶绿体就是光合作用发生的地方。
标签：
TED演讲