Electronic tokens can be expensive, and must be carried by users at all times to ensure access.

但电子信物可能会很昂贵，而且为了保证能随时使用帐户，用户还必须老把它带在身上。

youdao

Electronic tokens can be expensive, and must be carried by users at all times to ensure access.

但电子信物可能会很昂贵，而且为了保证能随时使用帐户，用户还必须老把它带在身上。

youdao