# 我們可以預測一滴雨的行為,但天氣是由許多水滴和空氣分子組成,這些水滴和空氣分子對彼此的碰撞(以及風、山、冷氣帶等)很敏感。——《宇宙大哉問》
×
Sign in
Email
Password
Forgot password
or
By clicking below, you agree to our
terms of service
.
Sign in via Facebook
Sign in via Twitter
Sign in via GitHub
Sign in via Dropbox
Sign in with Wallet
Wallet (
)
Connect another wallet
New to HackMD?
Sign up