并且在真实数据集上进行了大量实验的英文

描述一个系统不仅能够检测网络欺凌（cyberbullying）但无法解释原因，并且已在真实数据集上进行大量实验的英文表达可以是：

1. "Capable of detecting cyberbullying without explaining why it qualifies as such, and has conducted extensive experiments on real-world datasets."
2. "The system can identify cyberbullying but does not provide insights into the rationale behind its decisions, having been tested thoroughly on actual datasets."
3. "While able to detect cyberbullying without explaining the reasons, it has been extensively validated through experiments on real data."
4. "This model has the ability to flag cyberbullying incidents, but remains opaque regarding the justifications for its classifications, and has undergone extensive testing with real-world datasets."
5. "Possesses cyberbullying detection capabilities without elucidating the underlying reasons, and has been extensively tested on genuine datasets."

这些表述都强调了系统在实际应用中的测试情况，同时指出它在解释其决策方面的不足。