1. Our challenges for this new century are clear.
    在新世纪中，我们所面临的挑战是显而易见的。

2. One health official recommends that when you sign a medical form you change it to make it clear "that you do not consent to having information re-released or sold to a second party without your direct, written consent".
    一位卫生官员建议，当填写医疗表格时，你可改变一下，清楚地表明"你不同意在没有你的直接书面同意的情况下将你的信息泄露或出卖给第二方"。

3. They can locate and steer clear of obstacles----or locate flying insects on which they feed.
    来确定并躲开障碍物，或找到它们赖以为生的昆虫。

4. I can hear you loud and clear.
    你的声音很大, 我听得很清楚.

5. I have tried to present the words and expressions here in a clear context.
    我在这里已尽量把这些字和词呈现在清楚的上下文中了.

6. It was clear that the reader had given up in despair.
    很明显，读者由于失望而放弃不读了。

7. I repeat: the runway is not clear for take-off.
    我再说一遍: 跑道尚未畅通, 不能起飞.

8. It is fairly clear that the sleeping period must have some function,
    很清楚，睡眠必然具有某种作用。

9. It was as clear as daylight then that burglars had forced an entry during her absence.
    事情很清楚，在她外出时，窃贼曾闯进家门。

10. It took me another three months to clear the inside, so as to make an exact boat of it.
    我又用三个月的功夫把树挖空,使它更像一条真船。