英和和英

clean the blackboard

to reform oneself―mend one's ways―turn over a new leaf

clean one's plate

a blackboard-rubber

an eraser

cleaning with a mop

scrubbing up―house-work

wipe the blackboard

wipe a desk clean

made clean by scrubbing

how to clean the optics

to sweep and clean

throw off the mask

clean with hard rubbing

to inquire into the origin―ascertain the source

to sweep something clean

to wash something

I will clean up

clean off the dirt

clean out the trash can

a rubber

an eraser

clean one's shirt of dirt

to wipe the blackboard

clean the table

scrub the floor clean

wash away a stain

bleach the laundry

to wash off―wash out―stains

Cleaning of white coats