speed(-)up gears

• 增速齿轮

英英释义

名词 speed:

1. distance travelled per unit time

2. a rate (usually rapid) at which something happens

3. changing location rapidly

4. the ratio of the focal length to the diameter of a (camera) lens system

5. a central nervous system stimulant that increases energy and decreases appetite; used to treat narcolepsy and some forms of depression

动词 speed:

1. move fast

2. move faster

3. move very fast

4. travel at an excessive or illegal velocity

5. cause to move faster