1、I would have thought they'd be very useful for children without brothers and sisters.
would/should have 过去分词 ，表示“应该做某事”，而实际没有。
本句可以翻译为：我应该想到它们对独生子女是很有用的。
2、The reality is that people learn subjects such as languages and mathematics at different speeds.
Speed ：「俚语」在这里应翻译为：嗜好，个性：适合某人的兴趣、技能或性格的东西：
E.G. Living in a large city is not my speed.
住在大城市里不是我所喜欢的
1、My parents recognized that the best learning is learning-by-doing, and they facilitated a lot of interesting experiences for me, whether it was driving me across town, paying for courses and lessons, or just including me in their lives.
我的父母认识到，最好的学习方法是边干边学。为此，他们让我体会了许多有趣的经历：或者开车带我在镇里转转，或者花钱让我让各种班，或者干脆将我直接纳入他们的生活。
本句解析： My parents recognized that the best learning is learning-by-doing, and they facilitated a lot of interesting experiences for me, （前半部分是具有递进意义的两个并列分句） whether it was driving me across town, paying for courses and lessons, or just including me in their lives. （后半部分是样态状语从句，其中由三个现在分词短语作表语）。
2、interacting with a large group of people my own age was one of the joys I derived from school.
Derive sth from sth.
