2. On and on he walked till finally he found—I give you a thousand guesses, my dear children! 他走啊走，最后，终于找到了——亲爱的孩子们，我可以让你们猜上一千次！
3. There are still huge gaps in our environmental knowledge, and despite the scientific onslaught, many predictions are no more than best guesses. "在我们的环境知识方面仍然有巨大的缺口，而且尽管有科学的助攻，但很多预测也只不过是最好的猜测而已。
4. Who guesses 100 centimeters? 谁猜是一百厘米？
5. Who guesses one centimeter? Who guesses 10 centimeters? 谁认为是一厘米？谁猜十厘米？
