【答案解析】Today, the majority of kindergarten children in China are the only-children. On the one hand, they are intelligent, imaginative, energetic, and eager to learn. On the other hand, they tend to be egoistic, undisciplined, and weak-willed. And this underlies why our education stresses collectivism, mutual help and love, and why children are encouraged to be independent and taught to enjoy the benefits of sharing. A study of the behavior of 1,000 kindergarten and primary school children found that only-children aged 4 to 6 are all egoistic, while children with siblings behave better in this regard and are willing to cooperate with others. But the only-children aged 9 to 10 exhibit such positive qualities as self-control and persistence. This suggests that it is very important to teach kindergarten children to be disciplined and cooperative. [解析] 1．“独生子女”译为only children，千万不能误译为single children。
2．“机灵、好学、想象力丰富、精力充沛”是几个并列的词语，无先后主次之分，两字词语在前，多字词语在后，符合汉语习惯。而如果我们不加变化地直接译为“intelligent，eager to learn，imaginative，and energetic”则不符合英语end weight原则，即一般将较长的成分放在最后的原则。因此，在不影响意思的情况下，适当地变化次序更为合适。
3．汉语无论定语有多长，一般都放在前面，而英语则不同，定语如果过长则放在后面。译文对原文第四句话的处理就反映了英汉两种语言的这种差异。
4．“可以看出”译成英语found或discovered都可以。
5．倒数第二句中的“表现出……的优点”采取意译的方法，译为exhibit such positive qualities as...，这样较好。
6．“这说明”译为This suggests较好，因为这实际是受前面研究结论的启发而得来的。