Speaker Deck
Speaker Deck
PRO
Sign in
Sign up
for free
Featured
Business
Design
Education
How-to & DIY
Programming
Research
Science
Technology
成臣 Chengchen
it2911
0 Followings
0 Followers
0 Stars
it2911
0
160
it2911
0
240
it2911
0
66
it2911
0
95