The symbol of the key to success on a solid backgroundThe symbol of the key to success on a solid background
Smoke is a stable dispersed system consisting of fine solid particlesSmoke is a stable dispersed system consisting of fine solid particles
A winding road in the mountains, marked with a double solid lineA winding road in the mountains, marked with a double solid line
Two solid ones on the road along the autumn forestTwo solid ones on the road along the autumn forest