What does it take to send a file from a phone to a printer, as depicted in Figure 2?

如果从电话向打印机发送文件，就像图2中表示的那样，需要什么呢？

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After a quick shower, you remember that you forgot to send your client a file last night. You pick up your phone again, but the battery gauge now reads 90%.

冲个澡之后，突然想起来昨晚上给一个客户的文件忘记发了，于是赶紧拿起手机，这时却发现：呀，电量怎么只有90%了呢？

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