have been developing slowly
发展缓慢
以上为机器翻译结果，长、整句建议使用 人工翻译 。
However, due to historical and policy-related reasons, enterprise pension have been developing slowly in China, and they are being explored stage in theory and in practice.
我国由于历史与政策的原因，企业年金起步晚，发展缓慢，在理论和实践方面均处于探索阶段。
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