Peter was finally persuaded and came to the scratch as expected.
彼得终于被说服了，并且不负期望地践了约。
An odd expression came into his face and he began to scratch at the earth.
他的脸上出现了一种奇怪的表情，然后他开始刨土。
That may be true, and indeed some of the most successful software projects came out of their authors' need to scratch an itch.
这或许是真的，实事上有些最成功的软件就来源于作者的直接需要。
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