暖手宝的英文：
hand warmer

Our discussion is warmer than theirs.
我们的讨论比他们的更热烈。

If I get cold, I wear warmer clothes.
如果我有点冷，我就穿点暖和的衣服。

In short, heat flows from the warmer to the cooler body.
总之，热总是从高温物体流向低温物体。

It is safe to get warmer as the day goes on.
天气确实一天比一天暖和了。

I usually use warmer pads in the winter.
我经常在冬天使用发热贴。