柯林斯词典yam /jæm/ (yams) 1. N-VAR A yam is a root vegetable like a potato with orange flesh that grows in tropical regions. 薯蓣; 山药2. N-VAR Yams are the same as sweet potatoes. 同sweet potato[美国英语] 返回 yam剑桥词典a potato-like root from a tropical climbing plant that can be eaten , or the plant it grows from 薯蓣，山药 US a sweet potato 甘薯，白薯，红薯，番薯（同 sweet potato） 返回 yam