not natural or real, but made by people
artificial
the opposite to increase
decrease
computer equipment
hardware
when you do not have enough of sth
lack
the programs you have on your computer
software
There are a lot of ... on TV.
programmes
not usual
unique
find sth by chance
come across
we do it with rubbish
throw away
we should drink ... 2 litres of water a day.
at least
when sth doesn't work
be out of order
make a summary
make a conclusion
I know everything about this
I am aware of this
a lot of
a number of
We did ... experiments at Chemistry lesson.
scientific
At the museum I saw lots of ... exhibits.
historical
