VOA常速英语:Doctors Achieve Milestone Using Artificial Heart With No Beat

词汇讲解：

1. milestone n. 重要事件;重要阶段;转折点;里程碑
例句：The company passed the ￡6 million milestone this year.
今年公司越过了600 万英镑这个里程碑式的数字。

2. implant vt. 在身体某部植入(组织等), 移植
例句：The operation to implant the artificial heart took two hours.
人工心脏植入手术花费了两小时。

3. grave adj. 严重的
例句：This heavy rain could have grave consequences.
这场大雨会造成严重后果。

4. prolong vt. 延长; 拉长; 拖延
例句：Two countries prolonged signing an agreement until details could be agreed on.
两国推迟签约直到就细节达成协议。

5. artificial adj. 人造的, 人工的, 假的
例句：The new dam will form a large artificial lake behind it.
新筑的水坝将会在后面形成一个人工湖。

6. deformed adj. 变形的;畸形的
例句：He is cursed with deformed arches.
他受畸形足弓之苦。

7. godsend n. 天赐之物;意外的好运
例句：Her gift of money was a godsend.
她送来的钱使人喜出望外。

8. durable adj. 持久的, 耐用的
例句：This varnish provides a durable finish.
这种清漆可作耐久的罩面漆。

9. interval n. 间隔, 间隙, 间歇
例句：The interval between the two trees measures 40 feet.
这两棵树的间隔是40英尺。

10. interrupt v. 中断;遮断;阻碍
例句：The war interrupted the trade between the two countries.
战争使两国间的贸易中断了。

11. speculate v. 推断; 猜测, 推测
例句：He speculated that he would succeed.
他推测他将成功。

12. innovation n. 改革, 革新, 创新
例句：An enterprise should encourage innovation.
企业应鼓励创新。