英语语法分析

In 1976 he joined the PLA and during this time he began to study writing.

1976年，他加入中国人民解放军，在此期间，他开始学习写作。

On April 23, 2019, a series of events to celebrate the seventieth anniversary of the Chinese People's Liberation Army (PLA) Navy was held in Qingdao.

2019年4月23号，庆祝中国人民海军建军70周年系列活动在青岛举行。

While much work remains, trends in recent years indicate the PLA is beginning to operationalize its modern force, taking on new and more challenging missions.

尽管还有很多工作要做，但近年来的趋势表明，解放军正开始将其现代化部队投入运营，承担新的、更具挑战性的任务。