GWD-2-19

craigchsieh

以下是引用valarie在2004-9-10 2:15:00的发言：

Q19:

Sunflowers growing in pots were placed, with their roots submerged, in the pond contaminated with radioactive elements.  The sunflowers kept growing; in the process, they absorbed radioactive elements.  Within twelve days, 85 percent of the radioactive elements were removed from the water, which is no less than can be accomplished with the much more expensive conventional filtration techniques.  Scientists therefore propose using sunflowers for decontamination wherever there are radioactively contaminated ponds.

请问这里怎么解释啊？是种花这方法没有比较便宜吗？感觉作者态度怪怪的～

伯爵奶茶

同GWD-1-Q15和GWD-1-Q33的套路：方法→目的  则support或者weaken应从方法可行性上施加作用

[此贴子已经被作者于2009-4-2 15:52:43编辑过]

a9141067s

还是不太明白呀!

哪位 NN可以帮忙解释一下吗?

thanks