Explain the meaning of this sentence: a small step forward, a big step forward.

1, which means: "One small step forward, one big step for civilization" is a popular tip in men's toilets, aiming to remind men to be closer when urinating and not to excrete urine outside the urinal. Sometimes the word "warm reminder" is added before this prompt. This tip is usually in the men's bathroom, above the urinal. Some trash cans will also have this hint.

2. Quotations: This sentence is adapted from the famous saying of neil armstrong who landed on the moon: "This is a small step for me personally, but it is a big step for mankind."

3. Interpretation: Some trash cans will have this slogan next to them. This slogan aims to remind people not to be lazy and save trouble. A small step and a little effort is actually a big step for civilization and health.