translation.en: So they wait until winter -- the lake is completely frozen over -- and they use this meter-thick ice as a platform on which to establish their ice camp and do their work.
translation.zh: 所以他们只能能到冬天 湖完全结冰后 他们就可以利用这些几米厚的冰 这样他们就可以在冰上建帐篷来工作了