lower-case letters

They have to distinguish between words in upper and lower-case letters or even harder, they had to count the number of syllables in different words.

他们必须区分大写和小写的单词，或者更难的是，他们必须数出不同单词的音节数。

For the purposes of this problem, a word is defined to be a maximal sequence of upper - and lower-case letters.

对于这个问题的目的，一个字被定义为一个大写和小写字母最大序列。

This behavior applies also to out-of-vocabulary words if you type them in lower-case letters into your dictionary, such as ipod.

这一行为也适用于词汇表以外的单词，如果将它们以小写字母的形式输入到字典中的话，例如ipod。