For 14 years he collared hitchhikers who passed through town and quizzed them mercilessly.是什么意思？

For 14 years he collared hitchhikers who passed through town and quizzed them mercilessly.

14年来他跟踪调查那些经过城镇的流浪汉并无情的挖苦他们.

for

prep. 为，为了，倾向于，关于，当作；conj. 因为，由于；

例句
I've come looking for a bit of advice.
我特来讨教。

years

n. 年( year的名词复数 )，年纪，一年的期间，某年级的学生；

例句
His wife was sentenced to seven years imprisonment for aiding and abetting him...
他的妻子作为他的从犯被判入狱7年。

he

pron. 他，它，一个人；n. 雄性动物；

例句
Logic had prevailed and he had abandoned the idea.
最终理智占了上风，他打消了那个念头。

collared

有领圈的，上了轭[项圈]的，（肉）成卷的；

例句
As Kerr fled towards the exit, Boycott collared him at the ticket barrier.
克尔往出口方向逃窜，博伊科特在验票口逮住了他。

hitchhikers

VERB 搭便车（旅行）；搭顺风车；

例句
Many of these young hitchhikers probably come from good families.
也许这些年轻的搭车者中,很多人是好家庭出生.

who

pron. 谁，什么人，关系代词，有先行词，孰；

例句
The last French king was Louis Philippe, who abdicated in 1848.
法国末代国王是1848年逊位的路易·菲力普。

passed

adj. 已经通过的，已经过去的，考试及格的，（指红利）未及时发放的；v. 走过( pass的过去式和过去分词 )，通过，批准，度过；

例句
It was a Christmas when shoppers passed by expensive silks in favor of more practical gifts.
这是一个购物者不理会昂贵的丝绸衣服而热衷于更实用礼物的圣诞节。

through

prep. 通过，穿过，经由，透过，凭借；adv. 从头到尾，彻底，自始至终；adj. （电话）接通，通话完毕，有洞的，直达的；

例句
The proposal was instantly voted through with two to one in favour, accompanied by enthusiastic applause...
在热烈的掌声中，提案以2比1的优势很快通过了表决。

town

n. 城镇，市镇，小村庄，城镇居民，商业中心；

例句
Altogether, it was a delightful town garden, peaceful and secluded.
总体上说，这是个令人愉快的城市花园，宁静而偏僻。

and

conj. 和，与，而且，于是，然后，因此；

例句
I spend a lot on expensive jewelry and clothing...
我花很多钱购买昂贵的首饰和衣服。

quizzed

vt. 盘问（quiz的过去式与过去分词形式）；

例句
He was quizzed about his income, debts and eligibility for state benefits...
他被问及收入、债务以及是否有资格享受政府发放的救济金等问题。

them

pron. 他们，她们，它们；

例句
I take care of them to the best of my abilities...
我尽我所能地照顾他们。

mercilessly

adv. 无情地，残忍地；

例句
He teased me mercilessly about going Hollywood...
他毫不留情地嘲笑我想去好莱坞。