查询词典 null and void

Because to_tsvector will return NULL, it is recommended to use coalesce whenever a field might be null.

下面是一个从结构华的文档中创建 tsvector 的推荐的方法

The Filter By Null compound reduces the number of particles based on whether or not they're inside a null's icon shape.

Filter By Null复合节点是通过空物体的图标形状来过滤粒子发射。

However, it's okay for a non-null syntactic construct to have a degenerate case matching the null string

然而，一个非空的结构可以有一个老版的匹配空字符串方式。

Specifying a null string for file name If you specify a null string for filename , the remaining arguments are ignored.

指定一个文件名称为空字符串，如果你指定一个空字符串为文件名，其余的参数被忽略。

By employing the pole-null representation, we demonstrate that the lateral shift is closely related to the null of the reflection function.

利应用极点-零点描述理论，我们发现光束的位移与光束在该结构中的反射系数函数的零点密切相关。

To emulate null-modem connection Virtual Null Modem can be effectively used.

学习零调制解调器连接的虚拟零调制解调器可以有效运用。

The most expensive null modem cable is the null modem cable suitable for full handshaking.

最贵的无猫电缆是适用于全握手信号的无猫电缆。

The main purpose of this null modem cable is to let well defined software think there is handshaking available, with a null modem cable which has no provisions for it.

这个电缆的主要目的是让设计良好的软件认为握手正常。

Once you have inserted a null into the container, you must always check if the value is null before accessing the object

一旦你向容器插入了一个 null，你就必须在访问该对象前检查它是否为 null

Of zero, or the Null object None.of zero, or the Null object None.

空对象、值为零的任何数字或者Null对象 None的布尔值都是False。

If you were not , and OS X just booted normally, have no fear.

如果你没有，和OS X刚刚启动通常，没有恐惧。

I only want to preserve our all .

我只想保存好我们的一切