If the element's type is checkbox or radio, the value is added only if the HTML element is checked.

如果元素的类型为复选框或单选框，只有选中HTML元素时，才会添加值。

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RADIO — Only one of the items with this type can be selected.

RADIO——此类项目只能选择一个。

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While it's fairly simple to preselect checkbox and select input types using functionality built into the Struts JSP tags, the radio button input type requires a different solution.

虽然用内置在Struts JS p标记中的功能预先选中checkbox和select输入类型相当简单，但是radio button输入类型要求不同的解决方案。

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For instance, the Army bought so many of one type of tactical radio over the last 30 years that there are actually more of that type of radio in the force than there are soldiers.

FORBES: New Radio Could Revolutionize Combat for U.S. Forces

Dr Hewish is also scathing: he believes that the Oxford team is simply building a type of conventional radio antenna called a waveguide.

ECONOMIST: Physics

CowView uses a type of RFID (radio frequency identification) called UWB (ultra-wideband) technology.

BBC: RTLS: The technology tracking cows to make them happy