trick (n.& v.)
哄骗、欺诈
例句：
He was tricked into revealing the place where he had hidden the money.
他受人哄骗，泄露了他藏钱的地方。
not to mention
更不必说、何况
例句：
The boy hasn't learnt arithmetic, not to mention algebra.
这孩子算术还没学会，更谈不上代数了。
I can't tell.
我说不准。
对话：
A: Jack and Dick are twin brothers.
B: Yes. They look very much alike and sometimes I really can't tell who is who.
A：Jack和Dick是双胞胎兄弟。
B：是的。他们看起来非常像，有时我真分不清谁是谁。