1. "The movements are very slow and careful and involve a great deal of body movement and standing on a single limb.
    它的动作缓慢、细腻，动则牵引全身，立则依附单腿。

2. A single tree may seem large compared to a person.
    和人相比，一棵树看起来很大。

3. And I never can keep track of how many months old he is.”
    而且我从来都记不住他有几个月大。"

4. An immediate search over 100,000 square miles of sea failed to turn up a single piece of the missing plane.
    随后立即展开了范围宽达100,000平方英里的海面搜索，但没有发现一片失踪飞机的残骸。

5. A single gene will code for only one of the many molecules and cell proteins that are the building blocks of the brain.
    一个基因仅仅为构成大脑的众多分子和细胞蛋白中的一个指定遗传密码。

6. You'll find it easier, then, to keep from settling for the single piece of candy.
    那样，你就不会轻易满足于只吃一块糖了。

7. People also enjoy the excitement of climbing mountains or of riding in a boat on a river that is moving very quickly or of racing in a car around a track.
    从登山中，从在湍急的河流里扬帆荡桨中以及从竞技车赛中人们获得刺激。

8. — Children in single-parent households — usually families with only a mother present — are much more likely to be overtaken by poverty than those who live with two parents, largely because of the loss of support from the fathers.
    ——单亲家庭——通常是只有母亲的家庭——的孩子，较之与双亲一起生活的孩子，更可能遭受贫穷，这主要是因为缺少父亲的经济支持。

9. Clerks in stores followed our track to watch our every move.
    商店营业员紧紧地跟着我们、监视着我们的一举一动。

10. Charles's eyes went to the single window of the room.
    查尔斯将目光投向屋里惟一的窗户。