1. Portable boiling elements that can boil small quantities of water are useful when the right voltage of electricity is available.
    如果有相配的电压，可以煮少量水的便携式热水装置是有用的。

2. I don't think I'm old-fashioned but hearing those tuneless , offensive lyrics repeatedly makes my blood boil .
    我想我还不至于老得落伍吧，可没完没了地听那毫无韵律、令人讨厌的歌曲实在让我生气。