The exact number of victims is unknown.
目前受害者确切数字无法得知。
The exact number of cases and deaths is unknown at this time.
确切的病例数和死亡人数此时尚不可知。
Singulars are infinite in number, and the infinite as such is unknown.
个体的数量是无限的,而这种无限则是无从认识的。
The number of people present at meeting is unknown.
出席会议的人数还不知道。
The fundamental cause is unknown, though a number of predisposing conditions are recognized.
虽然研究者们已经发现了很多相关的发病因素,但其发病机制仍不清楚。
The fundamental cause is unknown, though a number of predisposing conditions are recognized.
虽然研究者们已经发现了很多相关的发病因素,但其发病机制仍不清楚。
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