of questionable antecedents;Of unknown origin;of dubious background来历不明 He appears to be a gentleman of many adventures and unknown antecedents他好像是一个绅士,冒过很多次险,可是身世不明。 .
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Visitor Sessions of Unknown Origin 其它访客人次
fever of unknown origin 不明原因发热 ; 不明热
Pyrexia of Unknown Origin 不明原因的发热 ; 不明热
PUO pyrexia of unknown origin 原因不明的发热
be of unknown origin 起源不明
effusion of unknown origin 不明原因胸腔积液
a word of unknown origin 来源不明的词
syncope of unknown origin 不明原因的晕厥
While there are signs that a mushroom is poisonous, they are not consistent, and all mushrooms of unknown origin should be considered dangerous to eat.
尽管有特征说明蘑菇是有毒的,但它们是不一致的,所有来历不明的蘑菇都应该被认为是有危险的食物。
This truck is of unknown origin.
这辆卡车来历不明。
The debris, of unknown origin, passed by without incident last Tuesday morning.
这块不知来源的太空垃圾在上周二早上安全通过空间站附近,没有发生碰撞。
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