1. He has to deduce what he can from the few scanty clues available.
    他们不得不从获得的稀少而贫乏的线索中尽其所能地进行推断。

2. He has to deduce what he can from the few scanty clues available.
    他们必须根据现有的不充分的线索进行推理。

3. That international sporting contests lead to orgies of hatred, one could deduce it from general principles.
    了解到国际运动比赛会导致疯狂的仇恨，也可以从常理中推断出结论。