That may or may not be true.
这可能是真的，也可能不是。
The novel is based on a true story.
这部小说是根据真实的故事写成的。
He reveals his true character to very few people.
他没有向什么人显露过他的`真实性格。
Our results should be a good approximation to the true state of affairs.
我们的结果应该和实际情况相当接近。
He was a true friend, in every sense of the word.
无论从哪个角度讲，他都是个真正的朋友。