However sometimes it is an error, and sometimes it is an exception.
但是在有些情况下这是一个错误，有些情况下是异常。
Usually photographers avoid such topics… But sometimes they make an exception to draw attention to the problem and, as a result, to make our planet cleaner.
通常摄影师会避免这样的主题…但为了引起人们对问题的注意，有时他们也会破例，他们想要的结果是：让我们的地球更清洁。
However sometimes it is an error, and sometimes it is an exception.
不过在有些情况下这是个错误，有些情况下是异常。
This is communicated using an invalid return value from a queuing operation, or sometimes via an exception.
这个错误可能是在队列操作时返回一个错误的值或者有时候产生了一个异常导致的。
This is communicated using an invalid return value from a queuing operation, or sometimes via an exception.
这个错误可能是在队列操作时返回一个错误的值或者有时候产生了一个异常导致的。
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