It's really important to use freshly boiled water, don't reboil it.

一定要用刚烧开的水，不要反复煮沸。

Silvia then reboiled the chestnuts again in a syrup of water and sugar to soften them.

西尔维亚接着用糖水煮一次，软化栗子。

She did her best, she asked advice of Mrs. Cornelius, she racked her brain to remember what Hannah did that she left undone, she reboiled, resugared, and restrained, but that dreadful stuff wouldn't 'jell'.

她尽了全力，征询了科尼利厄斯太太书上的意见，绞尽脑汁地回忆汉娜做的事中有哪些她没有做。她重新烧煮，重新加糖，重新过滤，但那鬼东西就是不“结冻”。