Expressions must have integral type and can include only integer constants, character constants, and the defined operator.

表达式必须有整数类型并且只能包括整数常量，字符常量，以及定义了的运算符。

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Boolean constants and character constants also exist and are described in subsequent chapters along with their corresponding types.

类似的同样存在布尔型常量和字符常量，这些会在随后的章节与它们对应的类型一起介绍。

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Character and string constants support the standard escape sequences.

字符和字符串常数支持标准换码序列。

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Our celebration of initiative and enterprise, our insistence on hard work and personal responsibility, these are constants in our character.

BBC: Obama inauguration: Full text

Piety, and a sense of God's special favour hovering over England, are, he believes, constants in the English character which raises the question of where they have gone now.

ECONOMIST: Englishness