信号的不同之处在于它们不返回任何内容：既没有“信号返回”消息，也没有任何类型的错误消息。
Signals are different in that they cannot return anything: there is neither a "signal return" message, nor any other type of error message.
我们与“拓荒者”第10号飞船的最后一次接触，是在2003年的1月10日，当时只有一个微弱的信号返回到了地球。
The last contact we had with Pioneer 10 was on January 10, 2003, when a weak signal made it back to Earth.
宽带FM信号和窄带CF 信号传输到目标，从目标反射回来，然后返回猎蝠。
The broadband FM signals and the narrowband CF signals travel out to a target, reflect from it, and return to the hunting bat.
最强的返回信号来自云层。
如果在所返回的信号中出现任何延迟(例如，因GC暂停引起的延迟)，计算出的登月舱位置就是错误的。
If any delays occur in the signal being returned — for example, because of a GC pause — the Lander's position is calculated incorrectly.
这些声音在水下行进，直到遇到水下物体，然后返回到发出信号的海豚，显示出目标的位置，大小和形状。
These sounds travel underwater until they encounter objects, then bounce back to their dolphin senders, revealing the location, size, and shape of their target.
然而，飞机是由金属制成的事实将会增强它们返回到雷达的信号，以致使飞机很难完全被遮盖，希尔说。
However, the fact that the planes are made out of metal will increase their radar return and make it very hard to completely mask them, Hill said.
返回信号的强度提供了云和粒子的特征信息。
The strength of the returning signal provides information about the characteristics of the clouds or particles.
简单返回到撒切尔的信号不会使中产阶层兴奋，尽管大多数托利党人正是这样幻想的。
Simply returning to a Thatcherite message would not electrify the middle class, despite what many on Tory right think.
这个函数返回一个信号量集标识符，它与一个参数的键值关联在一起。
This function returns the semaphore set identifier associated with the argument key.
如果信号处理器返回，则进程继续执行信号被捕获时正在执行的正常的指令序列。
If the signal handler returns, the process continues executing the normal sequence of instructions it was executing when the signal was caught.
不过，如果程序不使用gethostbyname或者任何其他在同一对象中返回信息的函数，或者如果它每次使用时都会阻塞信号，那么就是安全的。
However, if the program does not use gethostbyname or any other function that returns information in the same object, or if it always blocks signals around each use, you're safe.
通常，信号处理程序将会返回，并进入上次离开时ioctl的位置处，这样SPU程序就可以继续执行了。
Normally, the signal handler will return and cause the ioctl to be entered at exactly the point where it was left so the SPU program can continue.
而且，该函数返回布尔值，因为为gtk Widget定义的delete - event信号的回调原型指明的是布尔返回值。
Also, the function returns a Boolean value because the callback prototype for the delete-event signal defined for GtkWidget states a Boolean return.
假定信号在close系统调用设置errno变量到其返回之前这一极小的时间片段内生成。
Suppose a signal is generated during the very small time gap between setting the errno variable by the close system call and its return.
然后使用值18 (SIGCHLD)来调用信号处理程序，确认子进程的退出，并且父进程返回到sleep (60)。
The signal handler is called with a value of 18 (SIGCHLD), the child's exit is acknowledged, and the parent goes back to its sleep (60).
在这样处理方式下，write系统调用返回被信号中断前已写的字节数，并将errno全局变量设置为成功。
By doing this the write system call returns with the number of bytes it wrote before it got interrupted and the errno set to success.
这个命令将立即删除信号量集及其数据结构，并唤醒所有正在等待的进程(如果发生错误，则返回，并将errno设置为EIDRM)。
This command immediately removes the semaphore set and its data structures, awakening all waiting processes (with an error return and errno set to EIDRM).
在这种情况下，接收SIGPIPE信号，或如果该信号阻塞，write函数将返回- 1并设置errno为epipe。
In this case, you'll receive a SIGPIPE signal or, if this signal is blocked, the write function will return a -1 and set errno to EPIPE.
这个函数创建信号量，并返回这个信号量的句柄。
This function creates the semaphore and returns the handle to the semaphore.
在成功打开信号量之后，这个函数就会返回这个信号量的句柄，这样就可以在后续的调用中使用它了。
Upon a successful opening, this function returns the handle to the semaphore so that it can be used in the subsequent calls.
通过读取引爆后返回的信号，机器可以识别信号里所包含物质的分子结构。
By reading the returning signals, the machines can identify the molecular structure of the materials it contains.
不过，由于输出信号不规则，它必须进行更多的的数据处理以匹配返回信号。
But because the outgoing signal is not known it takes more processing to match it to the return.
程序中的信号处理程序捕获到函数的执行被某个信号中断，信号处理程序然后按正常方式返回。
EINTR — the function was interrupted by a signal, which was caught by a signal handler in the program, and the signal handler returned normally.
在SHEL的最初测试中，ABL飞机使用安装在“大乌鸦”飞机上的激光信标模拟实际导弹目标会产生的返回信号。
On this initial test of the SHEL, ABL made use of beacon lasers installed on Big Crow to simulate the targeting return it would receive from a live missile target.
在您遇见的人的微笑。它不导致您一分，但是它派出信号，它倍数通过返回到您作为积极态度。
Smile at people that you meets. It does not cause you one cent, but it sends out signal, it multiples by returning to you as positive attitudes.
semflg值是在返回信号量集标识符之前对访问权限进行验证时设置的。
The semflg value is set while creation is verified for the access permissions before returning semaphore set identifier.
lpPreviousCount是指向上一个信号量计数器返回时的变量的指针。
LpPreviousCount is the pointer to the variable where the previous semaphore count is returned.
许多用户说它应该返回一个信号而不是一个异常。
Many users have commented that maybe it there should be a return value to signal this condition instead of an exception.
求所有插槽返回值的最大值，这样的信号结果才有点意思。为些，我们创建一个自定义合并器如下。
A more interesting signal result would be the maximum of the values returned by any slot. To do this, we create a custom combiner that looks like this.
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