provisional
/prəˈvɪʒənl; prə`vɪʒənl/ adj
for the presenttime only, with the possibility of being changed, etc later; temporary 临时的; 暂时性的
a provisional appointment, contract, government 暂定的职务、 暂时性的契约、 临时政府
a provisional driving licence, ie (in Britain) one that has to be obtained before one can start to learn to drive 实习驾驶执照.