VOA常速英语:Wireless Microchip Delivers Bone Drug

2. alternative n. 可供选择的事物
例句：What alternatives are there?
还有什么可选择的?

3. brittle adj. 硬但易碎的; 脆性的, 易损坏的
例句：The pond was covered in a brittle layer of ice.
池塘覆盖了一层易碎的冰。

4. lack n. 欠缺;不足;没有
例句：He can not buy it because of his lack of money.
他因缺钱买不起这个。

5. compliance n. 服从,听从,顺从
例句：I was surprised by his compliance with these terms.
我对他竟然依从了这些条件而感到吃惊。

6. dose n.(一次)剂量, 一剂, 一份；一场, 一次, 一回
例句：He gave me a dose of medicine for my cold.
他给我开了一剂治感冒的药。

7. alter v. 改变, 更改
例句：Has she altered her mind?
她改变主意了吗?

8. schedule n. 时间表, 日程安排表
例句：Have you made the examination schedule?
你已经安排了考试日程吗?

9. anticipate vt. 预期,期望;预料
例句：is impossible to anticipate when it will happen.
不可能预料这事何时发生。

10. speculative adj. 思考的,思索的,推测出的；投机的, 带着疑问的；好奇的
例句：Much of our information is speculative.
我们的许多信息是带推测性的。