RT @Learn_Things: A slope that takes the least time for something to roll down. https://t.co/RFkRiTU9eR 0 atbildes
Jānis Lazdāns (2017-11-09 05:34:45) |
RT @Learn_Things: A slope that takes the least time for something to roll down. https://t.co/RFkRiTU9eR |