For centuries, people who live in the high Andes have chewed coca leaves, whose alkaloids act as a mild stimulant and help to ward off cold and hunger.
3
她和朋友葛瑞丝和吉莉安正在用绳子和水桶往上拖毛毯、书本和零食。
She and her friends Grace and Gillian were hauling blankets and books and snacks up by rope and bucket.