open-faced

详细解释:a. 露面的, 坦率的

详细解释：

o.pen-faced

adj.（形容词）
Having a face that seems to exhibit honesty and sincerity.
相貌老实的，坦率的：看起来相貌坦率诚实的
Having a side uncovered:
有一面没有被覆盖的：
例句：
an open-faced sandwich.
无盖三明治