The various things that are iterators or iterator-like sometimes act sequence-like, but other times do not; conversely, sequences often act iterator-like, but not always.
迭代器或类迭代器有时表现得像序列，但有时候不是；反过来说，序列常常表现得像迭代器，但并非总是如此。
2
This file contains a set of rules that define on what type of character or number sequences the annotator should act and how it should act.
这个文件包含一组规则，这些规则定义注释器应该处理的字符和数字序列的类型以及处理的方式。
3
Various phone services are gone, like checking a bank balance by typing in the account number followed by # and/or *, for these act as escape sequences to the bank computer.