額外費用

extra(noun)

something extra, or something for which an extra price is charged

The college fees cover teaching only; – stationery and other equipment are extras.

額外的

extra(adjective)

additional; more than usual or necessary

They demand an extra $10 a week; We need extra men for this job.

特別的

extra(adverb)

unusually

an extra-large box of chocolates.

臨時演員

extra(noun)

in cinema or television, an actor employed in a small part, eg as a person in a crowd.

外加費用

extra(pronoun)

an additional amount

The book costs $6.90 but we charge extra for postage.

號外

extra(noun)

a special edition of a newspaper containing later or special news.