truth真相可数吗?

[U] quality or state of being true 真实（性）: There's no truth/not aword of truth in what he says. 他说的毫不属实.
(a) [U]that which is true 真相; 实情; 真实情况; 事实: the whole truth 全部事实 * the search for (the) truth 调查事实真相 * tell the truth, ie speak truthfully, not lie 说实话 * We found out the truth about him. 我们了解到了有关他的事实. * The (plain) truth is, I forgot about it. 老实说, 我忘了. (b) [C] fact, belief, etc that is accepted as true 真理; 原理: one of the fundamental truths of modern science 现代科学的一项基本原理.

牛津字典查到的，作为真相的时候解释时，是不可数

应该是可数的。名词复数为truths. 参考如下：http://www.dict.cn/search/?q=truth

By the end of the last term, we had studied three thousand words.

1.truth为可数名词,复数为truths。
2.填had studied,用过去完成时，因为前面by是跟了一个过去的时间连用，所以用过去完成时，而不用现在完成时。

不可数
2. had studied因为前面是By the end of the last term

作为真相的时候是可数的，作为真理的时候是不可数