PERUGIA, Italy (Reuters) - Four Italians have constructed what they believe is the world's first full-sized chocolate igloo（圆顶冰屋）but they have yet to solve an age-old problem. It still melts.

"It was a tough thing to do, much more difficult than building a normal snow igloo," Marco Fanti, 45, who used to race cars in desert rallies（沙漠汽车拉力赛）, told Reuters as he stood beside the 1.65-metre-high, dome-shaped（圆屋顶的）traditional Inuit（因纽特人的）shelter made of some 330 dark chocolate bricks.

Fanti and fellow instructors at a survival school took 23 hours working with tricky, crumbling chocolate material to construct what they believe to be the world's first chocolate igloo for the Eurochocolate fair in Perugia.

They normally build one made of snow, for survival courses, within three to four hours.

Fanti said it has yet to be decided what to do with the 3.6- tonne igloo -- which is kept indoors and will start melting at above 30 C -- when the fair ends on Oct 22.

Note:

四位意大利人建造了世界上第一座巧克力圆顶屋igloo。igloo是一种拱形圆顶小屋，爱斯基摩人的住宅，主要是用冰砖砌成的圆顶的冬季住宅。