Gerontology has suddenly become popular.是什么意思？

Gerontology has suddenly become popular.

老年学突然变得受欢迎了。

gerontology

n. 老年医学，老人学；

例句
It caters for the patients of gerontology and provides them with high - level and high - quality services.
面向广大老年病患者提供高水平优质服务.

has

v. 有( have的第三人称单数 )，（亲属关系中）接受，拿，买到；

例句
...the operation a patient has had.
病人做过的手术

suddenly

adv. 意外地，忽然地，奄，勃，霍然；

例句
'It was incredible,' Kurt says, suddenly aglow.
“简直难以置信，”库尔特突然满面红光地说。

become

vi. 变为，成为，变得，变成；vt. 适合，适宜，相称，相当，变成，发生；

例句
...abandoned buildings that become a breeding ground for crime.
沦为了犯罪温床的弃置楼群

popular

adj. 流行的，大众化的，民众的，大众的，公众的，通俗的，普通的，平易的，〈美俚〉自以为了不得的，骄傲的；

例句
The news was greeted with considerable popular acclamation.
消息赢得了相当普遍的欢呼。