1. A parent who only gives a brief reply to a child's questions or gives dull answers will be passing on a negative, narrow-minded style of thinking.
    对孩子的问题只做出简单的回应，或是只给出乏味的回答，这样的父母传给孩子们的是一种消极的、偏狭的思维方式。

2. 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。

3. 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。

4. — 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。

5. But she is never sufficiently strong-minded to be able to stop the practice.
    但她又缺乏足够坚强的意志把这一收集活动停下来。

6. 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。

7. Children were told that they could have a single treat, such as a piece of candy, right now.
    他们告诉孩子们可以马上吃到一样东西，比如一块糖。

8. "I feel miserable because I haven´t got any jewels, not a single stone, to wear.
    “我觉得痛苦，因为我没有任何珠宝首饰可戴，一个都没有。

9. One wants to meet like-minded collectors, to get advice, to compare notes, to exchange articles, to show off the latest find.
    收藏者要会见情趣相投的收藏者，以获取教益，交流经验、交换收藏品，炫耀自己的最新收藏。

10. One single tear flows from her left eye, across the cheek and down onto the pillow.
    一颗泪珠从她的左眼中渗出，滑过脸颊，落在枕上。