1. 试用的：probational 试用的 | probationary 试用的 | probationer 试读生

2. 试用的/缓刑的：probation 试用期 缓刑期 | probationary 试用的 缓刑的 | probationer 试读生

3. 试用的; 缓刑中的; 实习中的 (形)：probational 试用的, 见习的; 缓刑的 (形) | probationary 试用的; 缓刑中的; 实习中的 (形) | probationer 试用人员; 缓刑中的犯人; 实习生 (名)

1. 试用的；见习的
    A probationary period is a period after someone starts a job, during which their employer can decide whether the person is suitable and should be allowed to continue.

    e.g. Teachers should have a probationary period of two years.
           教师应该有2年的见习期。

1. under terms not final or fully worked out or agreed upon

    e.g. probationary employees
           a provisional government
           just a tentative schedule

    Synonym: provisionalprovisionarytentative