Correct

追寻

/ zhuīxún / 
Strokes

Definition

to pursue/to track down/to search

Example

As a Verb

pursue; search; track down

1
Jǐngchá
警察
yīzhí
一直
zài
在
zhuīxún
追寻
sǐzhě
死者
de
的
mèimei
妹妹
  
。

The police have been chasing (up) the dead man's sister.

2
Zhuīxún
追寻
bàozhàwù
爆炸物
de
的
gēnyuán
根源

trace explosive materials to their source