r0343010
r0343010
Revert "r0343010"

This reverts commit 4f2f75031431f6d2ba1a398e9cd0a3489983793e.
Revert "Revert "r0343010""

This reverts commit 7dbaae00cdba786d10ba7518bef438904b37b1e5.
upload experience
homework
Merge remote-tracking branch 'upstream/master'
Merge pull request #16 from C-Volume/master

心得不錯，內容可以調整markdown之後再交一次會更好。