Wuhan Metro - Lines in Operation

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“His more memorable passages are as naturally bright as gleams of sunshine in misty weather. Nature furnishes him not only with words, but with stereotyped lines and sentences from her mint.”
—Henry David Thoreau (1817–1862)

“Human knowledge and human power meet in one; for where the cause is not known the effect cannot be produced. Nature to be commanded must be obeyed; and that which in contemplation is as the cause is in operation as the rule.”
—Francis Bacon (1560–1626)