十：Light bulb

Broccoli

主要内容介绍：

这段上课的录音是关于食用花椰菜的功效

笔果还原听力原文：

Generations of American children have been told, “Eat your broccoli!” And for decades, researchers have known that broccoli and related vegetables like cauliflower and watercress appeared to lower the risk of some cancers. And that compounds in the vegetables could kill cancer cells. But how the cruciferous veggies worked their medical magic was a mystery. Until now. Because researchers have figured out just what broccoli does that helps keep cancer in check. The work appears in the Journal of Medicinal Chemistry.

Proteins coded by the gene p53 help keep cancer from starting to grow. But when the p53 gene is mutated, the protection is gone. Mutated p53 is implicated in about half of all human cancers.

Broccoli and its relatives are rich in compounds called isothiocyanates, or ITCs. And these ITCs apparently destroy the products of the mutant p53 gene, but leave the healthy p53 proteins alone and free to suppress tumor development.

The researchers write that “depletion of mutant p53 may reduce drug resistance and lead to new strategies for treating cancer in the clinic.” In the meantime, eat your broccoli!

听力词汇/词组：

SST要点：

1.写出这段录音的主要内容：

This lecture introduces how broccoli and similar veggies can help human lower the risks of getting cancer.

2. 逐条介绍材料中提到的要点：

The speakers mentioned that generations of Americans are told to eat their broccoli. We believe that broccoli can kill cancer cells, suppress the tumor. It has been discovered that the protein coded P53 keep cancer from growing. However, if P53 is mutated, the protection is gone.

3. 如果前面少了一个点：

In addition, the speaker urges us to eat more broccoli.