She has an unerring instinct for people's weak spots.是什么意思？

She has an unerring instinct for people's weak spots.

她能准确地把握他人的弱点。

she

pron. 她，它；

例句
Her lover walked out on her after she had aborted their child.
她的情人在她打掉胎儿后甩了她。

has

v. 有( have的第三人称单数 )，（亲属关系中）接受，拿，买到；

例句
...the operation a patient has had.
病人做过的手术

an

art. 一（在元音字母前代替不定代词a），一任一某一，一个；

例句
He started eating an apple...
他开始吃苹果。

unerring

--

例句
Paul is a thoroughly likeable man with an unerring sense of comedy.
保罗十分讨人喜欢，开玩笑时很有分寸。

instinct

n. 本能，天性，冲动，天资，天才；adj. 深深地充满着；

例句
His instinct would be to seek a new accommodation with the nationalists...
他本能的反应会是寻求与民族主义者取得新的和解。

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。

weak

adj. 柔弱的，虚弱的，无力的，软弱的，不中用的，愚钝的，淡薄的；

例句
We are scared to abandon ourselves to our feelings in case we seem weak or out of control.
我们不敢放纵自己的情感，以免显得太过软弱或缺乏自制。

spots

n. 地点( spot的名词复数 )，斑点，少量，污迹；

例句
Holiday spots have seen a dramatic revival and tourist chiefs are competing for a slice of the action.
各个度假点重又呈现出一派兴旺景象，旅游业的龙头老大们都在争着分一杯羹。