1842、“你要确实知道”表示这是肯定的。这是显而易见的，无需解释。
New Century Edition
Cooper(2008,2013)
[NCE]1842. You must know positively means that it was certain, as is self-evident.
Potts(1905-1910) 1842
1842. Knowing thou shalt know. That this signifies that it is certain, is evident without explication.
Elliott(1983-1999) 1842
1842. That 'know for sure' means that it is a certainty is clear without explanation.
Latin(1748-1756) 1842
1842. Quod 'cognoscendo cognosces' significet quod certum constat absque explicatione.