to increase the speed of an engine or machine to its maximum limit

A long journey tests the strength of a horse; the first half of a couplet suggesting that a person's true character is only revealed over a long period of time. Usually followed by [[日久见人心|日久見人心|ri4 jiu3 jian4 ren2 xin1]].

Mario, the fictional character and protagonist of the video game franchise by Nintendo

Just as distance tests a horse's strength, so time reveals a person's character; a proverb meaning that a person's true nature or loyalty is only proven through long-term testing.

To travel at full speed; to go at full throttle.