试用品

prototype / trial product / test sample

trial product

to test / to try / experiment / examination / test

to try sth out / to be on probation

to use / to employ / to have to / to eat or drink / expense or outlay / usefulness / hence / therefore

articles for use / products / goods

(bound form) article; commodity; product; goods / (bound form) grade; rank / kind; type; variety / character; disposition; nature; temperament / to taste sth; to sample / to criticize; to comment; to judge; to size up / fret (on a guitar or lute)