He was a man of fifty, a sort of sea–wolf, with big eyes, a complexion of oxidised copper, red hair and thick neck, and a growling voice.

这人有五十岁，是个久海上风波的老水手，说话，样子是个不大好交往的人。他圆睁着两只大眼睛，面青铜，头发棕红，身材魁梧，一点也不象人们在社会上触到的人。

When zinc is exposed to the acid in the lemon juice, the acid oxidises, or removes electrons from the zinc, and the resulting positively charged zinc ions move in the solution.

当锌暴露于柠檬汁的酸的时候，酸就会氧化，或者是把锌里面的电子移除，所以带正电荷的锌离子就会在溶液中移动。