n.分（菲律宾辅币名）
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
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