Progress was agonizingly slow.是什么意思？

Progress was agonizingly slow.

进展的缓慢让人备受煎熬。

progress

n. 进步，前进，[生物学]进化，（向更高方向）增长；v. （使）进步，（使）进行，发展，促进；vi. 发展，（向更高方向）增进；

例句
Their progress at work was mirrored by their children's educational advance.
子女在学业上有所进步，他们在工作上也就会有所起色。

was

v. 用来表示某人或某物即主语本身，用来表示某人或某物属于某一群体或有某种性质（ be的过去式 ），在，存在，不受干扰；

例句
There was a terrible sadness in her eyes...
她眼神中流露出深深的悲伤。

agonizingly

adv. 使人烦恼地，苦闷地；

例句
Aircraft production continued to plod along at an agonizingly slow pace.
飞机制造业仍旧举步维艰，发展速度之缓很让人头疼。

slow

adj. 慢的，迟钝的，温和的，慢于…的；adv. 慢慢地，缓慢地；vt.& vi. （使）缓行，（使）减速；vi. 变慢，变萧条；vt. 放慢，阻碍；

例句
It's not a job for anyone who is slow with numbers...
这份工作不适合不擅长算术的人。