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 一束光线

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