1·If nullable, it will contain the null value.
如果可为空，它将包含null值。
2·If there is only one non-NULL value in the column.
如果列中只有一个非空值。
3·The String element, s[1], is assigned a null value.
这里的 String 元素 s[1] 被赋为空值。
4·Failure. The NULL value has been passed as a parameter.
失败。将空指针null传给了一个参数。
5·If no match is found within the input, a null value is returned.
如果在输入中未找到匹配项，则返回空值。
6·The expression may be a null value if the parameter is nullable.
如果参数可为空值，则表达式可能为空值。
7·The description column is left empty, which means it will have a NULL value.
description列留为空白，这意味着它将具有null值。
8·What if someone inadvertently passes in a null value for the Class parameter?
如果有人不经意地为Class参数传入一个null值会怎么样呢？
9·That means a reference type can have a null pointer, but a value type cannot have a null value.
这意味着引用类型可能有空指针，但是数值类型不能有空值。
10·The axiom of fuzzy null value join dependency is introduced and its availability is proved.
给出模糊空值连接依赖的公理系统，并且进行了有效性证明。