听一分钟英文：Heart-心脏

The heart is one organ we really have to look after. Most of us, I think, don’t really know how to look after it. Or perhaps we know, but don’t do enough to keep our heart in a healthy condition. Our heart is an amazing thing, when you think about it. It beats so fast for years and years and years, pumping millions of litres¹ of blood around our body. It keeps working, even though we do so many bad things to it. It really is the source² of our life. We need to promise our heart every day that we’ll look after it properly. I think kids born today are lucky. Modern medicine and science will soon have all the answers to keep our heart strong. Even today we’re lucky. Doctors can replace your heart via³ a heart transplant⁴.

1 litres   

n.升( litre的名词复数 )

参考例句：

• 3 litres of water 3升水
• The barrel would hold 100 litres. 这桶能装一百升。 来自《现代英汉综合大词典》

2 source   

n.来源，水源；原始资料

参考例句：

• They mentioned you as a good source of information.他们说你消息灵通。
• All works of art have life as their source.一切文艺创作都来源于生活。

3 via   

prep.凭借；通过；经过

参考例句：

• The news reached me via my aunt.那消息是通过我婶婶转告我的。
• The ticket reads to Beijing via Shanghai.车票上写明经上海到北京。

4 transplant   

n.移植的器官或植物；v.使迁移，使移居

参考例句：

• Some plants do not transplant well.有些植物不宜移植。
• Several of the patients had received kidney transplant.病人中有几位已接受了肾移植手术。