它还可以节省时间，如果对于节点集的唯一操作就是测试它是否是空的(通常是这种情况)，或者对它的第一个元素进行赋值。
It can also save time, if it turns out (as it often does) that the only thing done with the node-set is to test whether it is empty, or to get the value of its first element.
例如，如果该节点集在布尔型上下文中使用，唯一需要的处理就是测试它是否是空的。
For example if the node-set is used in a Boolean context, the only processing needed is to test whether it is empty.
詹得勒注意到这儿的信条是：便盆是干净的，软糖就是软糖，枪是空的。
Gendler notes that the belief here is: the bedpan is clean, the fudge is fudge, the gun is empty.
换句话说，如果SAD中的指示，连同实际的用例规格说明对开发人员来说足够构建用例的代码，那么用例实现就是空的。
In other words, if the directions in the SAD together with the actual Use-Case Specification are sufficient for the developer to build the code of the use case, the Use-Case Realization is empty.
只要投机者没有对他们看空的资产造谣，或以其他方式欺诈，他们的投机活动就是对社会有益的。
Provided the speculators do not spread false rumors about the assets they're hoping to see fall in price, or engage in other fraud, their activity is socially beneficial.
最重的行李就是一个空钱包。
如果这个列表为空，就不存在任何模块依赖项，因此这个模块就是要删除的模块(否则会返回一个错误)。
If this list is empty, no module dependencies exist and the module is a candidate for removal (otherwise, an error is returned).
用这个设备能实现的唯一连接就是在OPB上的从连接；请在最左侧的空总线框中单击，建立此连接(框内会出现一个小写的“s”)。
The only connection you can make with this device is a slave connection on the OPB; click in the leftmost white bus square to establish this connection (a lowercase 's' will appear in the box).
同样，第一列对应着空的目标单词，所以它就是删除0,1，…，i个字母的成本。
Similarly the first column corresponds to an empty target word, so it is the cost of deleting 0, 1,..., I letters.
当文件系统挂载到系统中之后，它最初是空的，在其根目录中唯一有效的操作就是使用mkdir 系统调用创建一个新的目录。
When the file system gets mounted, it is initially empty, and the only valid operation in its root directory is to create new directories with the mkdir system call.
特需病区，就是不一样。不少病房是空的，几乎没有嘈杂声，再也没有什么可以干扰母亲了。
The special wards were utterly different, many of which were empty at all and there was almost no noise.
例如，匿名资源(也就是空节点)可能需要作为描述的一部分被传输，根据定义，它们没有恰当的标识符。
For instance, anonymous resources (AKA blank nodes) may need to be transmitted as part of descriptions, and by definition they have no proper identifier.
听析过程中，哈吉斯每只手握一个圆柱形的电极；当他第一次加入山达基时，电极就是空的汤罐头盒。
During auditing, Haggis grasped a cylindrical electrode in each hand; when he first joined Scientology, the electrodes were empty soup cans.
卡罗：你的购物车几乎是空的，这就是你买的所有东西吗——牛奶、冰淇淋和一些小饼干？
Carol: Your shopping cart is almost empty. Is that all you're buying — some milk, some ice cream, and some cookies?
或许，问你有孩子幸福还是没孩子幸福，归根结底就是在问你看到的是糖果盘的哪一部分——是空的那一半还是满的那一半，至少我这个当娘的是这么看的。
Perhaps it just comes down to how you see the candy dish-half empty or half full. Or at least as a parent, that's what I'll keep telling myself.
自从葡萄牙国王的儿子宣布独立后，巴西一直就是一层一层往上加东西，而不是把旧的东西一扫而空，重新开始。
Since independence was proclaimed by the son of the Portuguese king, Brazil has been adding layer upon layer of change rather than sweeping away the old and starting afresh.
整个雅库茨克地区都要经受严酷的寒冬，沿着“白骨之路”下行几百英里就到了奥米雅空，是知名的“冷极”，就是在这里记录到了有人居住地区的最低温度——零下71.2度。
A few hundred miles down the "Road of Bones" is Oimyakon, known as "The Pole of Cold". It was here that the lowest ever temperature in an inhabited place was recorded – minus 71.2C.
要记住，DOM会创建结构良好的HTML，就是说这个目前为空的元素包括起始和结束标签。
Remember, the DOM will create well-formed HTML, meaning that the element is currently empty, with both a starting and ending tag.
也就是说，你可以传入任意多的，以分号分隔的字符串（包括空的列表）。
That is, you can pass in as many comma-separated strings as you want (including an empty list).
举个例子：如果安吉丽娜·朱莉给她的孩子用一款婴儿车，那就意味着这款婴儿车非常好，也就是说这款婴儿车在任何地方都会被抢购一空。
An example: If Angelina Jolie put her kids in a certain stroller, it meant that stroller was good for humankind, which meant the stroller sold out everywhere.
根据加州大学伯克利分校的教授约翰·库比亚托维兹所说，下载满容的电子书阅览器与空的阅览器相比，差距仅有1微微微克，也就是10-18 克（十的负十八次方克）。
According to John Kubiatowicz, from the University of California, Berkeley, the difference between an empty e-reader and a full one is just one attogram, or 10-18 of a gram.
市民首先要做的就是撕掉空塑料油瓶的标签并将它清洗干净；接着将废弃食用油倒入瓶中。
For residents, the system works like this: first, they peel off the labels from the empty clear plastic cooking oil bottle and rinse it; next, they fill it with their used cooking oil.
没有元素的阵列构造函数表示空阵列(也就是说，基数等于0的阵列)。
An array constructor with no elements represents an empty array (that is, an array with cardinality equal to 0).
你要做的就是创建一个本地化的“包装器应用”——为每个你想把它作为目标的平台，创建一个空的本地化应用，该应用简单地包含了一个web视图。
What you do is create a native "wrapper app" - for each platform you want to target, create an empty native app that simply contains a web view.
如果在HTML表单中将String字段保留为空，paramsmap中的控制器会将其看作空string(也就是“ ”)，而不是null。
If you leave a String field blank in an HTML form, it comes back to the controller in the params Map as an empty String (that is, ) instead of null.
d或——delete：从目标目录删除应用程序的符号链接，也就是卸空(unstow)应用程序。
D or — delete: Deletes application's symlinks from the target directory, i.e. unstows application.
d或——delete：从目标目录删除应用程序的符号链接，也就是卸空(unstow)应用程序。
D or — delete: Deletes application's symlinks from the target directory, i.e. unstows application.
应用推荐