及物动词

1. 发现;查出;测出
To detect something means to find it or discover that it is present somewhere by using equipment or making an investigation.

2. 觉察;发觉
If you detect something, you notice it or sense it, even though it is not very obvious.

1. discover or determine the existence, presence, or fact of

e.g. She detected high levels of lead in her drinking water
We found traces of lead in the paint

Synonym: observefinddiscovernotice