In this case, you're using a simple if... Else block to see whether any value stored in the state is accessible via the random key.
在本例中，我们用一个简单的if . . .else块来判断在状态中保存的值是否可通过random键访问。
Else code block is a simple logical crossroad that helps show why the test would fail or pass if one path - and not another - is taken, according to test expectations.
else代码块是一个简单的逻辑分支，根据测试期望说明选取一条路经——而不是另一条路经——之后测试将失败(或通过)的原因。
Until then, what else can we do with anL-shaped block?
我们能用一个L型的方块做什么呢？
The while loop, as was the case with the if statement, supports an optional else clause containing a block of program statements executed when the expression is False.
while循环与if语句一样，支持一个可选的else子句，其中包含一个当表达式计算为False时执行的程序语句块。
When the application needs to wait for input, whether from a user at the console, a Web services client, or something else, it will typically just block.
在应用要等待(不论是来自控制台的用户、WebServices客户端，还是其它什么地方的)输入的时候，应用通常都会阻塞。
The company is seeking a far-reaching order that would block the plaintiffs from collecting on their judgment in the u.s.-or anywhere else.
这家公司正在寻求得到一个影响深远的法院令，阻止原告在美国或者其它任何地方执行他们的裁决。
The company is seeking a far-reaching order that would block the plaintiffs from collecting on their judgment in the U. S. -or anywhere else.
这家公司正在寻求得到一个影响深远的法院令，阻止原告在美国或者其它任何地方执行他们的裁决。
The if statement supports an optional else clause that indicates a block of program statements that should be processed if the Boolean expression evaluates False.
if语句支持一个可选的else子句，指示当布尔表达式计算为False时应该处理的程序语句块。
Typically, these methods are written as one large if-else block or a Map lookup.
通常情况下，这些方法中的代码都有一个大型的if - else语句块或者一个map查找。
If anybody else comes, don't let them in. The room is chock-a-block already.
如果还有其他人来，别让他们进来，房间里已经挤得满满的了。
If anybody else comes, don't let them in. The room is chock-a-block already.
如果还有其他人来，别让他们进来，房间里已经挤得满满的了。
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