You can include string literals in your programs by enclosing them in matching pairs of single or double quotation marks.

程序中的字符串直接量是包含在单引号或双引号中的。

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Car hub bearing the past is the most used in pairs of single row tapered roller or ball bearing.

轿车的轮毂轴承过去最多的是成对使用单列圆锥滚子或球轴承。

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Single row angular contact ball bearings in universal design, (suffix BG) and spindle bearings are frequently used in pairs or sets.

单列角接触球轴承通用设计（后缀为BG）和主轴轴承经常成对或成套使用。

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Single row angular contact ball bearings in universal design, (suffix BG) and spindle bearings are frequently used in pairs or sets.

单列角接触球轴承通用设计（后缀为BG）和主轴轴承经常成对或成套使用。

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