有些还打到罐子，那是他不须怀疑的，因为它们发出声音来了。他见他们没有回音，所以丢第二次和第三次的石子，他猜想不出他们对暗号何以没有反应。
As there was no response , he threw stones a second and a third time, and could not imagine why there was no answer to his signal.
您可以编制各种消息并对它们进行加密，您的伙伴可以使用暗号来解码这些消息。
You could make up messages and encrypt them, and your friend could use the code to decode the message.
她还表示，卷尾猴看上去对这些暗号居然还会产生反应，这点出人意料，因为据知这一物种并非靠气味进行交流。
She added that it was surprising that capuchin monkeys appeared to respond to these cues, because the species is not known for using communication based on smell.
她还表示，卷尾猴看上去对这些暗号居然还会产生反应，这点出人意料，因为据知这一物种并非靠气味进行交流。
She added that it was surprising that capuchin monkeys appeared to respond to these cues, because the species is not known for using communication based on smell.
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