1. They can go to a sperm bank and take a chance on unknown genes.
    他们可以去精子库，尝试不知名的基因；

2. The journalists also get a chance to shoot a gun on the practice range; none of it seems that difficult, and we put most of the bullets somewhere on the target.
    记者们也有机会在练习场射击。射击似乎并不难，我们的子弹几乎都打到靶上了。

3. Through having the chance to talk with adults, children pick up not only language skills but also adult habits and styles of thought.
    通过与成年人的交流，孩子学会的不仅是语言技巧，而且还有成年人的习惯与思维方式。

4. No one discovers a rarity by chance. A truly dedicated searcher for art treasures
    没有人能碰巧发现一件珍宝。真正潜心搜寻艺术珍品的人必须有耐心。

5. No one discovers a rarity by chance.
    无论是谁都不会一下子就发现一件珍品。

6. No one on earth ever had a greater chance for glory.
    世界上再没有什么人有过比此更大的争取荣耀的机会了。

7. How long would you stay in Africa if you had a chance to go?
    如果你有机会去非洲的话, 你打算居住多长时间?

8. And it is only by chance that such a fate is avoided.
    因此，生物偶尔才能避免被吃掉的命运。

9. A.You think of turning down the chance because the job is too demanding.
    a.你想拒绝这个机会，因为这个工作要求太高。

10. Although many people assume that balance and movement problems are inevitable with age, an increasing body of evidence demonstrates that exercise can help improve balance and strength in elderly individuals and reduce their chance of falling.
    尽管许多人认为难以保持平衡和活动不便的问题随着衰老而不可避免，但越来越多的证据表明，运动有助于老年人增强平衡能力和增长力气，可减少他们摔跤的可能性。