She noticed him merely with a nod.是什么意思？

She noticed him merely with a nod.

她仅以点头向他打招呼。

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。

noticed

v. 注意（ notice的过去式和过去分词 ），觉察；

例句
Meg was so abstracted she scarcely noticed that the train had stopped...
梅格想得出了神，几乎没有注意到火车已经停了。

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。

merely

adv. 仅仅，只不过，只是，纯粹，全然；

例句
In actuality, Teddie did not have a disorder but merely a difficult temperament...
实际上，小特迪并非哪不正常，而仅仅是属于困难型气质。

with

prep. 和，跟，随着，关于，和…一致；

例句
A waiter entered with a tray...
侍者端着托盘进来了。

nod

vi. 点头，打瞌睡，上下摆动，变得粗心大意；vt. 点头示意，使弯曲，使屈服，点头答应；n. 点头，点头同意，打瞌睡，打盹，粗心大意；

例句
Dr Sinclair's affirmative nod seemed a shade reluctant.
辛克莱博士虽然点头表示了同意，但还显得有点不情愿。