The computer can be repaired in two hours.
那台电脑能在两小时内修好。
He has repaired the machine for two hours.
他修理这台机器已有两小时了。
Two hours ago, he said he had repaired that computer.
两小时以前，他说他已经修好了那台电脑。
The machine has been repaired for two hours.
这台机器已修了两小时了。
The water was shut off for several hours while the pipes were being repaired.
检修水管时，把水关上了几个小时。
The water was shut off for several hours while the pipes were being repaired.
检修水管时，把水关上了几个小时。
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