If the leak is quite low, as at _c_, the issuing stream has a still greater speed and strength, and gushes forth with a force determined by the height of the water above _c_. 伯莎M.克拉克.科学通论.
And yet most of us accept as a matter of course the stream which gushes from our faucet, or give no thought to the ingenuity which devised a means of forcing water upward through pipes. 伯莎M.克拉克.科学通论.