Previous element vertical constraint. A left float box's top margin edge may not be higher than the top margin edge of any block or floated box generated by an earlier element in the source document.

之前元素的垂直限制：左浮动框的上margin edge不能高于任何块或在由源文档中前一元素生成的被浮动框的上margin edge。

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The RM Source identifies the last message in a Sequence by including a LastMessage child element in the Sequence header block.

RM 源通过在Sequence 头部区域中包含一个 LastMessage 子元素来标志序列中的最后一个消息。

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This includes those elements made into a block-level element by using the float property.

这包括借助浮动属性被转变成块级元素的那些元素。

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The "prevent" element of the strategy aims to block radicalisation and reduce the supply of terror recruits by working with local communities.

BBC: UK to shift anti-terror strategy