aImperfect indicative 不完美表示[translate] athey hide the brick of the copse into the cistern 他们掩藏小灌木林的砖入储水池[translate] aWe'll pushing the clients to comfirm dead freights. 我们推挤客户的意志对comfirm空水脚。[translate]
What started as an experiment in 1640 to prove the existence of natural vacuums led to the discovery of atmospheric pressure. In 1643, Evangelista Torricelli filled a long tube with mercury, closed the end, and placed it in a shallow, open cistern that also contained mercury. When the tube ...