Low friction: Skis on snow, Surfboard on water, Dolphin swimming in water, Ice skates on ice, Bowling ball rolling in the alley, High friction: Tyres gripping road, Rock climbing, Running in sand, Striking a match, Stopping your bike with its brake,

Friction card sort

排行榜

視覺風格

選項

切換範本

恢復自動保存: ?