Source:http://ftr.wot-news.com/2015/01/12/straight-outta-supertest-crews-retrain/
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Hello everyone,
大家嚎， 

Wotleaks published a supertest leak (unconfirmed for now) that patch 0.9.6 might bring the feature of retraining the crews to another role (eg. from radioman to driver).
Wotleaks公布了一个超测服的泄露消息（现在还不确定），就是0.9.6版有可能会加入能够把一个乘员训练成另一个职位的功能（栗如从通讯兵训练成驾驶员） 

Edit: confirmed by another source to be present. It’s possible that WG might not choose to implement it, but it’s there.
另：其他渠道的消息表明，这东西的确是有。但是WG有可能会选择不实装这个功能，但是总之已经做出来了。