| 例句 |
Terry was sitting on the bottom stair.特里正坐在最下面的一级楼梯上。He tripped on the bottom stair and almost fell.他在楼梯的最下面一级绊了一下，差点摔倒。He sat waiting on the bottom stair.他坐在最下面的一级楼梯上等着。Lucy sat down on the bottom stair.露西坐在最下面一级阶梯上。He was standing on the bottom stair.他站在楼梯最下面一阶。 |