【例句】He is out for dust. 【误解】他出去打扫灰尘。 【正确】他出去赚钱。 【说明】be out for dust是固定短语，意为“一心想赚钱”，也说be out for gold dust。gold dust指“沙金”或“金钱”。例如： My father was out for gold dust in his early ages. 我父亲很小的时候就外出挣钱。