a tall round tower standing sentinel over the river镇守在河边的一座高高的圆塔sentinel duty哨兵义务We gave the watchword, and the sentinel let us pass.我们说出口令, 哨兵就把我们放过去了.The lone sentinel walked toward his post.忧愁的哨兵走向岗哨....
a tall round tower standing sentinel over the river镇守在河边的一座高高的圆塔We gave the watchword, and the sentinel let us pass.我们说出口令, 哨兵就把我们放过去了.The lone sentinel walked toward his post.忧愁的哨兵走向岗哨....