Englishfor English speakers
booster
—
noun
an additional dose that makes sure the first dose was effective
—
noun
the first stage of a multistage rocket
—
noun
an amplifier for restoring the strength of a transmitted signal
—
noun
a thief who steals goods that are in a store
—
noun
(= promoter)
someone who is an active supporter and advocate
—
noun
(= supporter, friend)
a person who backs a politician or a team etc
all their supporters came out for the game
they are friends of the library
ratio
Noun
—
A ratio is the comparison in size or number between two things. It is written mathx:y/math and read mathx/math to mathy/math. It is the same as the fraction math\frac {x} {y}/math.
The ratio of men's jobs to women's is 8 to 1.
But Germany now has one of the highest ratios of spending to GDP in the European Community.
The low student/teacher ratio makes this a great school.