没有针对头部和有效负荷元数据元素添加事件对象定义，因为它们不包含实现该场景所需的任何数据。
Event object definitions were not added for the header and payload metadata elements because they do not contain any data required to implement this scenario.
非洲疟蚊通过我们富含二氧化碳的呼出物找到我们，它们不叮咬我们的头部，转而去叮咬我们的脚，显然那儿才是它们觅食的最佳场所。
African Anopheles mosquitoes find us by our carbon-dioxide-rich exhalation. But when they get close they turn away from our heads and dive for our feet-apparently their preferred snack spot.
我们现在先不涉及版本控制的细节(将在稍后讨论)，先来看看这两个头部的作用。
Without getting into the details of versioning (which will be discussed later) let's consider what these two headers are doing.
悬空表演者要面无表情，头部平伸，不转动。
The planker's face must remain expressionless, head held straight, not turned.
除此之外，世界各地的实验室里还有更多更不出名的机器人，它们有的能用手安全地抓起东西，有的能走上几步，而保持特别昂贵的头部不倾斜。 凭着这些技能，它们抢得了媒体的头条。
A range of less famous models in labs around the world grab headlines by gripping objects without destroying them, or walking a few steps without tipping onto their extremely expensive heads.
是否点头头部等于“赞成”，并动摇头部意味着“不”，在所有文化？
Does nodding the head mean "yes", and shaking the head mean "no" in all cultures?
不建议头部向前换气，因为这需要太多的能量去把头部抬得足够高，以便换气，这会造成游速变慢。
Breathing head forward is not suggested since it requires too much energy to lift the head high enough for a breath and will cause slower swimming.
不呼吸的时候头部也保持了流线型。
Streamlined head position when the athlete is not breathing.
独角兽鱼一般是不侵略的，但在一个罕见打架期间它们防卫它们自己用向前的尖头叉子在两个边上的它们的尾部而不是突出的角在它们的头部。
Unicorn fish are generally nonaggressive, but during a rare fight they defend themselves with forward-pointing prongs on either side of their tails rather than the prominent horn on their heads.
读取已经排列好但尚未发送给客户端的头部信息，注意参数名不区分大小写。
Reads out a header that's already been queued but not sent to the client. Note that the name is case insensitive.
交易者购买的一个期货合同不冲销先前建立的空头部位。
A position in which the trader has bought a futures contract that does not offset a previously established short position.
至于头部，固然她的妆容优雅细腻，但我不喜好她的发型——太浪漫随性了点。
And on top of that, although her make up is exquisite, I do not like her hair - again too romantic.
至于头部，固然她的妆容优雅细腻，但我不喜好她的发型——太浪漫随性了点。
And on top of that, although her make up is exquisite, I do not like her hair - again too romantic.
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