SQL程序员有时候很难记住大小写敏感这一点，因为SQL查询语法允许使用“ zip ”、“ zip ”和“ zip ”来引用同一个列名。

Case sensitivity is sometimes difficult for SQL programmers to remember, as SQL query syntax permits them to use "zip," "zip," and "zip" to refer to the same column name.

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他们认为英语很难学，而且很难记住新单词和语法规则。

They think English is difficult and it's hard to memorize new words and grammatical rules.

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