s having been turned so that the bottom is no longer the bottom
s (used of noses) turned up at the end
a. 朝上的, 翻过来的, 翻转的
1. The cat lay on the floor with its upturned paws.
猫趴在地上，爪子朝上。
2. She wore an upturned collar to keep warm in the cold wind.
她翻起领子以抵御寒风。
3. The old boat had an upturned hull, making it difficult to sail.
这只旧船的船体翻转，导致航行困难。