HOP的第1章从几个简单的主题展开了讨论，例如递归和回调，同时给出了很好的例子。
Chapter 1 in HOP opens with simple topics like recursion and callbacks, always backed by good examples.
30：我曾经跟妻子约法三章过，只要住处离工作地点在两个街区内，我就得在6：30回家。
30pm: I made a deal with my wife, when we moved two blocks from the university, that I'd be home by 6.30.
夫妻俩觉得很有意思，不明白盖这个章有什么用，所以，一回到家，丈夫就找出一个放大镜，想看看印章上写了什么字。
The couple was curious about what the stamp was for, so when they got home, the husband got out his magnifying glass to try to see what it was.
章，回，篇：一部相对较长作品的一个主要部分，如通常标有页数和标题的书的。
One of the main divisions of a relatively lengthy piece of writing, such as a book, that is usually numbered or titled.
当赫敏不想让其他人发现她、罗恩和哈利从海格的小屋回学校的途中在雪地上所留下的脚印时，她就用了一个擦除咒。 （ 《凤凰社》第20章）
Hermione used an Obliteration Charm as she walked to make it look as though she, Ron, and Harry hadn't walked back from Hagrid's hut in the snow (OP20)
一共21章800回。请坐回原位，系好安全带，准备好这趟长久刺激的旅途！
There are a total of 21 books spanning 800+ chapters, so sit back, buckle your seat belts, and get ready for one long ride!
本文第一章介绍我们的超声波声速仪的原理和误差分析，并给出它和回呜法的比较。
In the first part of this paper, the principle and the error analysis of our ultrasonic velocimeter are presented, and a comparison with the "Sing Around velocimeter" is given.
本文第一章介绍我们的超声波声速仪的原理和误差分析，并给出它和回呜法的比较。
In the first part of this paper, the principle and the error analysis of our ultrasonic velocimeter are presented, and a comparison with the "Sing Around velocimeter" is given.
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