But it again raises the question of whether this phenomenon is real?
但它再次引出一个问题，那就是这种现象是否真实？
There is no doubt that the earth is becoming warmer but there is fierce debate over whether it is human activity that has caused this global warming or whether it is just a natural phenomenon.
毫无疑问地球正在变暖，但究竟是人类活动使地球变暖还是它仅仅是一种自然现象，就此引发了激烈的争论。
This phenomenon, known as source amnesia, can also lead people to forget whether a statement is true. Even when a lie is presented with a disclaimer, people often later remember it as true.
这种现象称为来源失忆症，它可以引导人们忘记某一具体说法是否真实，甚至当谎言遭遇否认时，谎言在人们后来的记忆中都变成真话了。
It is a problem worth thinking whether or not this phenomenon will still exist in the 21 st Century.
男扮女装和女扮男装现象是否能在2 1世纪继续留存，是值得我们思考的问题。
There is no doubt that the earth is becoming warmer but there is fierce debate over whether it is human activity that has caused this global warming or whether it is just a natural phenomenon.
毋庸质疑的是地球正在变暖，但关于它变暖的原因是由于人类活动所致还是一种自然现象还存在激烈的争论。
However if this phenomenon persist, you may record it eg. in a camera. This video record may help your Paediatrician to decide whether further investigation is required.
但若此情况持续，则最好用摄录机拍下情况，以便儿科医生能判断是否需要进一步检查。
However if this phenomenon persist, you may record it eg. in a camera. This video record may help your Paediatrician to decide whether further investigation is required.
但若此情况持续，则最好用摄录机拍下情况，以便儿科医生能判断是否需要进一步检查。
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