board-and-brace door的用法和样例：
例句
- In one corner a ladder went up to an open trap door.
角落里有一道梯子，通往上面敞开的活板门。 - Since the inn's bamboo cots had all been used to make extra beds, the waiter had placed a door plank across two unpainted wooden benches to serve as Ku's bed.
那伙计因为店里的竹榻全为添铺用完了，替顾先生把一扇板门搁在两张白木凳上，算是他的床。
