detect
单词辨析：
指发觉不易察觉到的事物。
It is difficult to detect the cause of his death.
很难找出他的死因。
He detected a note of excitement in her voice.
他听出她的话语中带着兴奋。
强调通过仔细思考而察觉某事。
She soon discerned that her husband was lying.
她很快就觉察出丈夫在撒谎。
It is easy to discern a certain coldness in her welcome.
很容易觉察出她的迎接有点冷淡。
相关例句：
Arnold could detect a certain sadness in the old man's face.
阿诺德能觉察到老人脸上的一丝悲伤。
But this method can detect which are infected with HIV-1 recently and which are long-term infection.
但是这个方法可以检测出哪些是HIV-1近期感染者，哪些是长期感染者。
Fortunately, this is easy to detect in Web apps; you can apply a fuzzy test.
幸运的是，很容易在Web应用程序中检测这一点，您可以应用一种模糊测试。
The enemy didn't detect our scouting platoon's movements.
敌人没有觉察出我侦察排的行动。
An observant doctor can often detect depression from expression, posture, and movement.
善于观察的医生常常能从人的表情、姿势以及动作诊察出抑郁症。
Their antennae and shells help them to detect and protect.
他们的触须和外壳帮助他们探测和保护自身安全。