逆命题

We first show that the contrapositive,,of a conditional statement always have the same true value as .

在这里我们要说一个命题的逆命题和否命题是等价的，在这里读者可以自己证明，在证明这样的问题时，一般只能有真值表进行证明。

The converse does not hold, since any infinite set can be given the discrete metric under which it is bounded and yet not totally bounded.

但逆命题不成立，因为任何无限集合可以用离散度量给出，在其下它是有界但非完全有界的。

While, Zeilberger and Wilf [39] showed that proper hypergeometric terms are holonomic and conjectured that the inverse assertion also holds.

所幸的是Zeilberger和Wilf在中证明了正则的超几何项是完整的并猜想其逆命题也成立。

Now a study in the journal Psychonomic Bulletin and Review shows that the reverse is also true: driving makes it hard to keep track of what we're talking about.

目前，《心里唯名公告与评论》杂志上的一项研究表明其逆命题也是成立的：驾车会分散我们交谈的注意力。

We now shall derive the converses of these propositions.

现在我们来推导这些命题的逆命题。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。