...a theory that is steadily gaining acceptance...是什么意思？

...a theory that is steadily gaining acceptance...

逐步得到承认的理论

theory

n. 学说，理论，原理，推测；

例句
...a theory that is steadily gaining acceptance...
逐步得到承认的理论

that

det. 那个，那；pron. 那个，那；conj. 多么，如此…以至，用于某些动词、形容词和名词后，引出各种从句；adv. 不那么，那样；

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

is

vt.& vi. 是（be的三单形式；n. 存在；

例句
Bollinger 'RD' is a rare, highly prized wine.
博林格RD香槟是一种名贵的备受推崇的葡萄酒。

steadily

adv. 稳定地，持续地，稳固地；

例句
...a theory that is steadily gaining acceptance...
逐步得到承认的理论

gaining

n. 开槽；v. 获得( gain的现在分词 )，赢得，增加，（钟、表）走快；

例句
...a theory that is steadily gaining acceptance...
逐步得到承认的理论

acceptance

n. 接受，接纳，[金融]承兑，无怨接受（逆境、困境等），赞成；

例句
The Party is being degraded by its acceptance of secret donations...
该党因私下接受捐赠而蒙羞。