adj.仰着的；向上翘的；翻过来的
动词upturn的过去式和过去分词形式.
She looked down at the sea of upturned faces. 她俯视着一大片仰起的脸孔。
Her upturned collar protected her neck from the cold. 他那上翘的领子使他的脖子免受寒冷的侵袭。
He felt a sharp prick when he stepped on a upturned nail. 他一脚踩在一枚尖头朝上的钉子上，感到一阵剧痛。
