The origin of the word remains obscure.
该词的来源尚不清楚。
Wooden legs are perhaps the most interesting of these prosthetics, for their origin in myth is more obscure than their true history.
木制腿在这些修复术中是最有趣的一种，因为它们神秘的起源要比它们的历史更加隐晦。
Obscure gastrointestinal bleeding is defined as bleeding of unknown origin that persists or recurs after a negative initial endoscopic evaluation of both the upper and lower gastrointestinal tracts.
来源不明性胃肠出血是指首次上、下消化管内窥镜检查都阴性、原发部位不明的持续或反复性出血。
The origin of April Fools' Day is obscure.
原产地愚人节是掩盖。
The origin of April Fools' Day is obscure.
原产地愚人节是掩盖。
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