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Merge remote-tracking branch 'lhw2/Feature1' into Feature1

Conflicts:
	lession2.txt
Merge remote-tracking branch 'lhw2/Feature1' into Feature1

Conflicts:
	lession2.txt
Merge remote-tracking branch 'lhw2/Feature1' into Feature1

Conflicts:
	lession2.txt
Merge pull request #56 from pinguo-liaofeng/Feature1

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