英语词组“调查”怎么说

调查
[动]
（为了解情况进行考察）
investigate;
examine;
inquire
into;
look
into;
[名]
research;
（为此所进行的考察）
investigation;
expedition;
examen;
[例句]他们决定彻底调查这件事。
They
determined
to
inquire
thoroughly
into
the
matter.