When Adderall is ingested, it takes effect on the brain within an hour of use.

当 Adderall 被摄入后，它会在一个小时内对大脑产生影响。

The Vision Pro has two hours of use with an external battery, which Apple said would reduce the weight on the user's head.

Vision Pro 使用外部电池可以使用两个小时，苹果表示这将减轻用户头部的重量。

To begin with, the battery needs recharging after a mere 2 hours of use.

首先，在仅仅使用两小时之后，电池就需要充电。

To begin with, the battery needs recharging after a mere two hours of use.

首先，在仅仅使用两小时之后，电池就需要充电。