下面句子中in that our development .是一种什么用法：

下面句子中in that our development .是一种什么用法：we are keenly aware that we still have a serious problem in that our development is not yet well balanced,coordinated or sustaninable.这句话的翻译是：我们清醒地认识到，我国发展中不平衡、不协调、不可持续的问题依然突出。