Explain why you think this person is a good parent. If you were a parent and you were busy at work, would you take care of your children on your own or hire a babysitter.
解释一下为什么你认为这个人是一个好家长。如果你是一个家长并且忙于工作，你会自己照顾你的孩子还是雇一个保姆。
If he's suddenly never around, he may really be busy at work or he may be busy with someone else.
如果他突然失踪了，或许是工作真的很忙，也或许他忙于跟别的女人约会。
If any given server is unavailable or too busy at the time the request arrives, the cluster transparently passes the request to a server capable of handling the work.
如果特定服务器在请求到达时不可用或过于繁忙，集群可以透明地将该请求传递给其他可用的服务器。
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