professor

explain

principles

microobject

micro

object

manipulation

use

laser

beam

activity

board

time

lapse

fast

indoor

school

laboratory

lab

complicated

formula

speak

show

university

room

auditory

table

bundle

knot

transfer

displacement

shift

science

physics

chair

optics

draw

write

timelapse

one

man

labour

technical

tech

hitech

research