an improvement
Scientific advances is what enabled the doctors to find a cure for their mother's illness.

built by humans
Although synthetic fabrics can be quite nice, manmade leather is never as nice as the real thing.

what something is made of
You can buy all the materials you need to make that dress at the fabric store.

a circular path in space around a planet
The orbit of the planet was mysteriously altered.

to a certain extent
I thought the final exam was rather hard.

to be played again
I missed the game but they will replay it on TV tomorrow night.

a device used to transmit information from the sky
The communications satellite lost its signal with the Earth.

anything that serves to indicate, warn, direct, command, etc.
Give me a signal when it is time for me to come on stage.

the use of science to improve our knowledge of machines and everyday life
A major breakthrough in technology was the innovation of solid state circuits, which largely replaced vacuum tubes in early computers.

with no luck or with bad effects
unfortunately, I don't have my credit card with me or I'd buy lunch.