A message consists of a header, an empty line, and a body.
消息包括一个标题、一个空行和一个主体。
For example, Line 2 shows a check that determines if an empty string has been provided.
例如，第2行检查提供的是否是空字符串。
She handed the pole to Li Wen, who lowered the line, and raised it when she felt a jerk, only to see an empty hook.
探春交给了李纹，李纹急忙把竿垂下，觉得丝儿一动，忙挑起一看是个空钩。
This line also traps for a null value and converts it to an empty string to prevent problems during later processing.
这一行代码也会专门处理null值，它将null值转换为一个空字符串以避免后面的处理出现问题。
The movie doesn’t have to be great; it can be stupid and empty and you can still have the joy of a good performance, or the joy in just a good line.
电影嘛，不一定非要拍得怎么怎么好；它可以傻不啦叽、空洞无物，但你照样能得到愉悦，也许是从不错的表演中，或者只是从一句不错的台词里头。
Almost four years after the storm, a quarter of the population has never returned. A third of homes still lie empty, many decked with tarpaulins and with the flood-line still visible.
风暴过去了差不多四年，四分之一的人口从未返家，三分之一的家园仍然闲置，很多房屋一直装着防水布，上面洪水的痕迹依然清晰可辨。
Leave the empty line blank, because you do not need a specific boot time kernel parameter, and click OK.
使该行为空，因为您不需要特定的引导时间内核参数，然后单击ok按钮。
Relativity says that light always moves in a straight line through empty space, and always at the same speed in a vacuum, no matter what your observation point.
它指出光在真空中走直线，且在真空中光速恒定，不论你的观测点如何。
A title, which expresses a short, human readable subject line for the entry, and can be a blank string (represented by an empty title element, such as).
标题(title)，简短的、人类可读的记录主体行；允许使用空字符串(用空的标题元素表示，如)。
This does mean that the lexer and the parser both have to know that an empty line separates a header from a body.
这确实意味着lexer和解析器都必须明白，是一个空行将标题从主体中分离了出来。
In Listing 16, Line 1 shows the creation of a new mapped error message that is displayed when a value of None (or an empty string) is encountered.
在清单16中，第1行创建一个新的错误消息，当遇到none值(或空字符串)时显示它。
It then builds a new regular expression in indent_pat that matches exactly the same sequence of whitespace at the start of any non-empty line (hence the trailing '\ s').
随后在indent _ pat中构建一个新的正则表达式，精确匹配任何非空行的起始处的相同序列的空白(即拖尾' \S ')。
If instead the preceding code did not contain line 2 and if you used a second button with an Open page simple action to go to page2, the computed field would come back empty.
如果上述代码中不包含第二行内容，并且使用带有简单操作Openpage的第二个按钮以转到page2，那么computed字段将返回空值。
Can you imagine the racket made by a line of empty trailer trucks rolling along cobblestone streets?
你能想象出一队空的拖车卡车在卵石路上行进所发出的噪音吗？
For example, here's a short mail message. The first five lines make up the message header, and the actual message (a single line, in this case) follows after an empty line.
例如这里的邮件信息。前五行组成了消息标头，隔一个空行后是消息主体。
Retain newline. A non-negative size argument limits the maximum number of bytes to return (an incomplete line may be returned then). Return an empty string at EOF.
读取文件的一行，保留换行符，到文件末尾返回空串。
In each figure the data points are shown as empty circles while a linear fit is shown as a solid line.
在每幅图中，数据点都作为空心圆而示出，而线性拟合用实线示出。
This paper introduces a system which USES PLC to control the process of conveying of milk-producing line. Capacitive sensors are used to distinguish the milk carton full or empty.
介绍了一种用传感器分辨牛奶生产线运输带上的纸盒内是否装有牛奶并用PLC控制牛奶盒去向的系统。
Draw a straight line above the empty part of the balloon.
上面画一个气球的空白部分直线。
Children clutching empty bowls form a line.
紧紧抓着空碗的孩子们排成一队。
Children clutching empty bowls form a line.
紧紧抓着空碗的孩子们排成一队。
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