拡大する v angličtině:

Their business is expanding.

That market has been rapidly expanding.

The world population is expanding at the rate of nearly 90 million people a year.

The bureaucracy is expanding to meet the needs of the expanding bureaucracy.

Global agricultural output was expanding.

The princess's taste for pleasures was expanding; and we thought only about how to sprinkle on them new seasonings, so as to give them more spice.