【大自然】

a stretch of field一片原野
a bolt of lightning一道闪电
a flood of moonlight一片月光
a beam of light一束光
a layer of rock一层岩石
a cloud of smoke一团烟雾
a blade of grass一片草叶
a block of wood一块木头
a thin coat of ice一层薄冰
a gust of wind一股风
a field of flowers一片花海