The meeting is scheduled for April 6th.
Water can be changed from a liquid into a solid.
When rust is formed , a chemical change has taken place.
She was given a new pen by her father.
Heat and light can be given off by this chemical change.
Only a small portion of solar energy is now being used by us.
Communication satellites have already been used for living transmission in our country.
The numerical data concerned are provided in the next chapter.
The issue has not yet been thoroughly explored.
She was seen to enter the building about the time the crime was committed.
What we say here will not be long remembered, but what we do here can change the world.
Measures have been taken to prevent the epidemic from spreading quickly.
Water can be shown as containing impurities.
The unpleasant noise must be immediately put an end.
The decision to attack was not taken lightly.
Printing was introduced into Europe from China.
The manuscript was sent to the printer in London a few weeks before the French revolution.
The credit system in America was first adopted by Harvard University in 1872.
The minister was found to have appropriated government money.
He had been fired for refusing to obey orders from the head office.
The schoolboy was knocked down by a minibus when crossing the street.
He was praised by his teacher.
Problems should be resolved in good time.
For a long period to come, most of China’s elderly will continue to be provided for by their families.
It is considered that bioclimatology is an involved subject.
It is stressed that the field of science may be divided into two major areas: natural science and social science.
It should be pointed out that this process is oxidation.
It is hoped that... 希望，有人希望
It is assumed that... 假设，假定
It is claimed that... 据说，有人主张
It is believed that... 有人想信，大家相信
It is reported that... 据报道，据通报
It is considered that... 人们认为，据估计
It is said that... 据说，有人说
It is supposed that... 据推测，人们猜测
It has been announced that... 已经宣布
It is asserted that... 有人主张
It is rumored that... 有人主张
It is rumored that... 听说，谣传
It is noticed that... 有人指出，人们注意到
It is suggested that... 有人建议，建议
It is reputed that... 人们认为，可以认为
It is learned that... 据说，据闻，已经查明
It is demonstrated that... 据证实，已经证明
It is estimated that... 据估计，有人估计
It is estimated that... 有人指出，人们指出
It is pointed out that... 有人推荐，有人建议
It is proposed that... 有人提出
It was told that... 有人曾经说
It was first intended that... 最初就有这样的想法
It will be said that... 有人会说
It will be seen from this that... 由此可见，因此可知
It was noted above that... 前面已经指出
It must be admitted that... 必须承认，老实说
It has been illustrated that... 据图示，据说明
It is stressed that... 有人强调说
It is stressed that... 有人列举出了
It can not be denied that... 无可否认
It can be said without exaggeration that... 可以毫不夸张的说
It is sometimes asked that...人们有时会问
It was felt that... 有人认识到了
It is universally accepted that... 人们普遍认为
It is unanimously agreed that... 大家一致同意
It is alleged that... 据说
It is calculated that... 据计算
It has been proved that... 已经证明
It has been found that... 人们已经发现
It is still to be hoped that... 我们仍然希望
It is well-known that... 众所周知，大家都知道
It should be realized that... 我们应该认识到……