把以下英文翻译成中文,谢

1it has already been well established that changes in pupil size are clearly associated with changes in attitude.
1。已经有多项迹象表明学生数量变化能影响到情绪变化。

2it is indisputable that there are millions of people who still have a miserable life and have to face the dangers of starvation and exposure.
2。还有数百万人过着艰苦生活和不得不面临饥饿的危险，这是个不争的事实。

3it is common knowledge that forecasting iss an attempt by meteorologists to determine what weather will be like inthe future.
3。众所周知，预测是彗星学家对未来气候的推测。

1。很多迹象已经确定，瞳孔大小的变化与人态度的变化是相关联的。
2。还有数百万的人仍然生活在痛苦中，并要面临饥荒的危险。这是一个不争的事实
3。众所周知，天气预报是气象学者对未来气候的推测。

1,已经有多项迹象表明,瞳孔大小的变化变化和情绪的变化有很明显的关联。 Pupil指瞳孔

2,还有数百万的人仍然生活在痛苦中，并要面临饥荒的危险,这是一个不争的事实

3,众所周知，天气预报是气象学者为了对未来气候的推测.