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So what kind of attention are they attracting? And why?
那么，它們想吸引什么注意呢？為什么？
Well, sometimes flowers provide shelter for insects, a place to lay eggs for instance.
有些時候花朵給昆蟲提供庇護，比如為它們產(chǎn)卵提供場所。
But usually the attraction is food: nectar and pollen.
但通常來說，食物才是吸引力所在：花蜜和花粉。
Nectar is mainly a sugar solution, while pollen is a grain made up of part of the plant's cell structure.
花蜜主要是糖溶液，花粉則是由部分植物細胞結構組成的顆粒物。
In both nectar and pollen production, quality and quantity vary over time.
在制造花蜜和花粉的過程中，質量和數(shù)量隨著時間變化而不同。
But they are always related to the needs of the pollinator.
但它們都和傳粉者的需求有關。
You can see that the relationship between pollinators and plants are delicate, so any number of factors can disturb them.
你們也能發(fā)現(xiàn)，傳粉者和植物之間的關系是很微妙的，任意因素都能影響它們。
Human development is one.
人類發(fā)展就是其一。
And agriculture is generally believed to be the most harmful.
而農業(yè)被認為是其中最有害的。
It can fragment habitats in a variety of ways, reducing the number of pollinators, which in turn may reduce the number or size of the flowers, which of course affects the animals that feed on them.
農業(yè)會以不同方式將棲息地碎片化，減少了傳粉者的數(shù)量，轉而可能會減少花朵數(shù)量或讓花朵變小，這肯定也會影響以此為食的動物。
Exotic plant species not native to the area can move in and compete.
外來植物，即不是本區(qū)域的原生植物，能遷進來，參與競爭。
Even bees brought in to pollinate crops can alter natural pollen dispersal systems of rainforest plants.
甚至連引進來的蜜蜂給作物傳粉，也會改變雨林植物的花粉分布系統(tǒng)。
On the other hand, recent studies have shown that the disruption of one aspect of the pollination cycle doesn't usually lead to the extinction of other species.
另一方面，最近研究表明，僅干擾授粉循環(huán)的其中一方面通常不會導致其它物種的滅絕。
It turns out that plant-pollinator relationships are more adaptable to change than we thought.
原來植物和傳粉者的關系比我們預想中的更具適應性。
So really it is hard to know just how agriculture affects the pollination of plants.
所以，人們真的很難知道到底農業(yè)是怎樣影響植物傳粉的。
What is the lecture mainly about?
這節(jié)課主要講了什么？
What does the professor say is the ideal pollinator for a plant?
教授說的植物的理想傳粉者是什么？
According to the professor, what are some features of a flowering plant that can affect how attractive it is to pollinators?
根據(jù)教授所言，對一株開花的植物而言，什么特性能影響植物對傳粉者的吸引力？
Why does the professor mention bats?
為什么教授要提到蝙蝠？
According to the lecture, what can be inferred about a royal water lily whose flowers are red?
根據(jù)這節(jié)課的內容，
What is the professor's opinion about the effect of agriculture on pollination ecology?
關于農業(yè)對授粉生物學的影響，教授持什么觀點？
