生物工程椎间盘能缓解背部疼痛

词汇讲解：

1. 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。

2. chronic adj. (病)慢性的;(人)久病的
例句：She's developed a chronic cough.
她的咳嗽已成了一种慢性病。

3. spine n. 脊柱; 脊椎
例句：He sustained an injury to his spine when he fell off his horse.
他从马上摔下来, 伤了脊梁骨。

4. experiment n. 实验;试验
例句：Some people learn by experiment and others learn by experience.
一些人通过实验学习,另一些人则从经验中学习。

5. surgery n. 外科手术
例句：Your condition is serious and requires surgery.
你的情况很严重, 需要动外科手术。

6. duplicate vt. 复制
例句：Can you duplicate the key for me?
你能把这把钥匙再给我配一把吗?

7. stiff adj. 僵硬的; 不灵活的; 一动就疼的
例句：The old man's joints were stiff.
那个老人的关节不灵活了。

8. colleague n. 同事, 同僚
例句：He is a colleague of mine.
他是我的同事。

9. replace vt. 取代;以...代替
例句：The brakes have to be replaced.
刹车需要更换。

10. replicate vt. 复制;重复
例句：The DNA of chromatin must replicate before cell division. 
染色质DNA在细胞分裂之前必须复制。

11. mimic vt. 模仿, 与...极相似;呈现...的形象
例句：The actor amused the audience by mimicking some well-known people.
那位演员模仿某些名人,以此逗乐观众。

12. 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。