It is important to state your sources.
It is vital to state your sources.
It is sensible to have antivirus software installed.
It is critical to have antivirus software installed.
Because it's important to sense other people responding to humor, 'canned laughter' is used for television or radio comedy.
他人がユーモアに反応するのを感じるのは大事なので、TVやコメディでは 'canned laughter' が使われているのです。