Откуда оброзавался фразеологизм сложа руки

Как читать стих?(по русскому)

My heart’s in the Highlands, my heart is not here;

My heart’s in the Highlands,a-chasing the deer;

Chasing the wild deer, and following the roe,

My heart’s in the Highlands, wherever I go.

Farewell to the Highlands, farewell to the North,

The birth-place of Valour, the country of Worth;

Wherever I wander, wherever I rove,

The hills of the Highlands forever I love.