sergent和sergeant区别：sergeant军士sergent是中士,但词典里没有sergent这个词。
sergeant
英 ['sɑ?d?nt] 美 ['sɑ?rd?nt]
n. 中士；巡佐；军士；警官；（法庭或议会等地的）警卫官。
The sergeant expects obedience from his men.
中士要士兵服从他的命令。
A police sergeant is below an inspector.
巡佐的级别低于巡官。
You may fade away and the sergeant will take over.
你可以走了，军士会来接替你的。
The sergeant gave his men the command "At ease!"
警官命令战士们“稍息！”