a half cup 释义：

半杯

例句：

He told me to drink a half cup of this potion every morning and evening.

他告诉我每天早上和晚上各饮用这药剂的半杯。

half a cup释义：

半杯

例句：

Half a cup has only about 25 calories.

半杯只有25卡路里。

Mix two cups of water with half a cup of sugar and heat on high.

用两杯水(注：半升)混上半杯糖(注：125克)加热。