1 to add oil

2 to top up with gas

3 to refuel

4 to accelerate

5 to step on the gas

6 (fig.) to make an extra effort

7 to cheer sb on

1 Hara (Japanese surname)

1 original

2 former

3 originally

4 formerly

5 at first

6 so, actually, as it turns out

1 cause

2 origin

3 root cause

4 reason

5 classifier: 个 gè

1 original text

1 sticking unmoving to the original (idiom); not an iota changed

2 untouched

1 original identity fully revealed (idiom); fig. to unmask and expose the whole truth

1 to plan to seize power of the whole country (idiom)

1 a single spark can start a huge blaze (idiom); an insignificant cause can have a massive effect

1 lit. oily and shiny to the point of reflecting (idiom)

2 lustrous