"系统正在维护中"用英语怎么说?

Question

是 “our system is on maintainace"还是"our system is to maintain"?

Answer 1

our system is on maintainace有点道理，但不一定准啊。
our system is to maintain这个不对，不定式表叫来，不符合语境。
our system is being maintained 这个是绝对正确的。

Answer 2

翻译：(xi tong zheng zai wei hu zhong)

就这个翻译，信我吧，给分我。O(∩_∩)O~