真假难以分辨清楚
而人为的假山不露人工的痕迹，令人真假难辨。
The artificial rockery showing no artificial trace, is difficult to distinguish between true and false.
我们可以理解，对于受益于安慰剂的患者来说，是否被治愈了，也是真假难辨的。
Patients who benefit from placebos might understandably wonder if the healing isn't somehow false, too.
该类犯罪由多方原因引起，而且犯罪升级快，真假难辨，社会危害性巨大。
This series of continuingly escalating crimes are caused by a variety of reasons, and it is difficult to tell the true from the false.
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