We are particularly grateful to him for his timely help.是什么意思？

We are particularly grateful to him for his timely help.

我们特别感谢他的及时帮助.

we

pron. 我们，咱们，笔者，本人，朕，人们；

例句
...expensive make-up that we saw being advertised by a beautiful model...
我们所见的由一位漂亮模特代言的昂贵化妆品

are

vi. （用于第二人称单复数现在时，第一、三人称复数现在时）是；n. 公亩（等于100平方米）；

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。

particularly

adv. 特别，尤其，异乎寻常地；

例句
...an incident which particularly affronted Kasparov.
让卡斯帕罗夫感到特别受辱的一件事

grateful

adj. 感激的，感谢的，令人愉快的，宜人的，荷；

例句
Both had much cause to be grateful for the secretiveness of government in Britain.
双方都有充分的理由对英国政府的行事隐秘深表感激。

to

prep. 向，朝着，到，关于，属于；adv. 朝一个方向的，到某种状态，关闭；

例句
I suggest you leave it to an expert...
我建议你把它留给专家来解决。

him

pron. (he的宾格)他；

例句
They said goodbye to him as he got aboard the train at Union Station.
当他在联合火车站登上火车之际，他们向他道别。

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。

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。

timely

adj. 适时的，及时的；

例句
A timely bingo win brought some cheer to Juliet Little's family yesterday.
昨天玩宾戈赢了一把，适时地给朱丽叶·利特尔一家带来些许的欢快心情。

help

vt.& vi. 帮助，有助于， 有利于；vt. 治疗，避免，招待（客人），给…盛（饭、菜）；n. 帮助，助手，补救办法，有用；vi. （在餐桌旁）招待，侍应，作仆人（或店员、服务员等）；int. [呼救语]救命！；

例句
It might help if campaigning didn't absorb so much time and money.
如果竞选活动没耗费这么多的时间和金钱，情况或许还不会这么糟。