During the war his pacifist leanings were not helpful.是什么意思？

During the war his pacifist leanings were not helpful.

战时他的和平主义思想派不上用场。

during

prep. 在…的时候，在…期间，当…之时，其间；

例句
...the accrual of funds used during construction.
建设过程中资金的累积

the

art. 指已提到的人（物），指说话人与听者已知的人（物），用于独一无二的事物前，与形容词最高级和序数词连用；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

war

n. 战争，战争期间，斗争，论战；vi. 进行战斗，作战，同…处于交战状态；

例句
The war has aggravated an acute economic crisis...
战争加剧了原本已很严重的经济危机。

his

pron. (he的所有格)他的，(he的物主代词)他的东西；det. 属于他的，用于名词前，自己的，指某人的，上帝的；

例句
He claimed that his parents had abandoned him...
他声称父母遗弃了他。

pacifist

n. 和平主义者，反战主义者，绥靖主义者，持消极态度者；adj. 非战主义的；

例句
During the war his pacifist leanings were not helpful.
战时他的和平主义思想派不上用场。

leanings

n. 倾向，爱好，偏爱( leaning的名词复数 )；

例句
During the war his pacifist leanings were not helpful.
战时他的和平主义思想派不上用场。

were

be的过去时复数和第二人称单数形式，有时代替 was,用于条件从句、动词 wish 之后等；

例句
Shops, houses, and vehicles were set ablaze.
店铺、房子和车辆全都陷于火海。

not

adv. 不，[用以表示否定、否认、拒绝、禁止等]不是，几乎不，未必，没有[用于否定后面的词或短语]；

例句
It became very clear that the incident was not just an aberration, it was not just a single incident.
事实已经很清楚，这件事不是偶发的，它并不是一起孤立的事件。

helpful

adj. 给予帮助的，有益的，愿意帮忙的；

例句
The staff in the London office are helpful but only have limited information...
伦敦办事处的工作人员给予了帮助，但他们掌握的信息有限。