英语里有没有under secret construction的说法?
我翻译了一个句子,汉语到英语：
It is said China's first aircraft carrier is under secret construction in a shipyard in Shanghai, its biggest city.
据说,中国的第一艘航母正在其最大城市上海的一家船厂秘密建造.
类似的还有under careful treatment?受到精心治疗?
因为我见过可以有I take great interst in sth, 还有She took active part in this sport.不知上面的可行否?谢谢指教!