The doses I suggested for adults could be halved or quartered.

我建议的成人剂量可以减半或减至四分之一。

Low interest rates are bad news for savers, who have seen their income halved over the last year.

低利率对储户来说是个坏消息，他们在过去一年就看到了收入减半。

The shares have halved in value.

股价已经跌了一半。

Toyota has halved its output.

丰田产出减半。

And energy for lighting will be halved.

照明能源会减半。