sentinels怎么读？

n.岗哨，哨兵( sentinel的名词复数 )...

Sentinels were placed at all the approaches to the farm.在去农场的所有路上都布置了哨兵.Sentinels stopped them, enquired, passed them.哨卡拦阻他们, 盘问他们, 放他们通行.Their pink buds , thrust up like arrows , seemed sentinels watching over Baiyangdi...