都市 の 人口 が 増した。
トシ ノ ジンコウ ガ マシタ。

Optimized studying based on the forgetting curve vastly improves memorization. - What is reminDO?

Memorize

cowpoke

Flag post / Block

• Register
• Sign up
  

• Sign in
• Twitter

  Facebook

  Google
  ID or E-mail address:

  password:

  Sign in
  
  Forgot Password