For host keys, you probably don't want a passphrase for the key, so you can just press Return to use a blank (empty) passphrase.
对于主机密钥，您可能不需要密钥密码，所以您可以按Return使用空密码。
In Table 1, the cell associated with the key (000002, contact: HTTP, t4) is empty.
在表1中，与键(000002,contact：http,t4)关联的单元为空。
Even ssh-keygen command will accept the empty passphrase, in which case, private-key file will not be encrypted.
尽管ssh - keygen命令可以接受空的密码，但是在这种情况下私有密钥文件不加密。
By not applying key constraints in the database, a field that requires information has been left empty.
由于没有在数据库中应用键约束，必须包含信息的字段却是空的。
Jumping down to the Details section for this entry, we see the key statistic behind this server condition: the Coffee Pot is empty.
跳到该条目的Details部分，我们看到这个服务器条件下隐藏的关键统计数据为：TheCoffeePotisempty。
Line 16-17: Make sure an entry for our subscriber key exists. If not, create an empty one.
第16—17行：确保我们的订户关键字存在。如果没有的话，创建一个空的。
Class that is empty, has the specified initial capacity, and USES the default equality comparer for the key type.
类的新实例，该实例为空且具有指定的初始容量，并为键类型使用默认的相等比较器。
Spectrum sensing technology is a key component of cognitive radio whose function is to find out the empty frequency bands quickly and reliably.
频谱检测是感知无线电的关键技术之一，要求感知用户可靠、快速地检测频谱空洞。
Metastability and how to generate empty and full flag correctly is key in the design of asynchronous FIFO.
避免亚稳态问题及空满控制信号的产生是异步fifo设计的两个关键。
Specifies whether to create a folder or registry key as part of every installation, even if the folder or registry key is empty.
指定即使在文件夹或注册表项为空的情况下，是否也要创建该文件夹或注册表项作为每次安装的一部分。
Specifies whether to create a folder or registry key as part of every installation, even if the folder or registry key is empty.
指定即使在文件夹或注册表项为空的情况下，是否也要创建该文件夹或注册表项作为每次安装的一部分。
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