Their origin is uncertain, but archaeologists hypothesize that they were Canaanites.
他们的起源是不确定的，但考古学家推测他们是迦南人。
The fossil lungfish is a new species, but a name cannot be given because of its uncertain origin.
这种化石的肺鱼是新的物种，但因为它不确定的来源导致至今无法命名。
So researchers may be able to use the sizes of the wormholes in items of uncertain origin to identify their larval attackers.
因此对于来源不确定的标本，研究人员可以通过它的虫洞尺寸来辨别的幼虫攻击者。
Punning in Chinese has a long history, though it is of uncertain origin.
汉语双关名称来源不详，但其使用源远流长。
This may offer a new approach to the more timely and precise diagnosis of acute coronary syndrome in patients presenting with chest pain of uncertain cardiac origin.
对于以不能肯定为心源性胸痛为表现的急性冠状综合症患者，这提供一种更及时和更精确的诊断新方法。
The clonal origin of multiple lung tumors is uncertain.
多发肺肿瘤的起源克隆尚不清楚。
Primary sclerosing cholangitis (PSC) is a rare disease of uncertain origin.
原发性硬化性胆管炎是一种病因不明的少见疾病。
The origin of the custom is uncertain, but it seems to have come about in France as a result of the change in 1582.
此传统的来历不详，不过似乎起源于法国1582年的一次变故。
The origin of the custom is uncertain, but it seems to have come about in France as a result of the change in 1582.
此传统的来历不详，不过似乎起源于法国1582年的一次变故。
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