21、俗语说得好：「…」。
Well goes an old saying，“…”
As an old saying goes(runs， says)，“…”
An old saying goes，“…”
It's an old saying (that)子句
例︰俗话说得好：「诚实为上策」。
As an old saying goes，“Honesty is the best policy.”
22、(A)…用下列方法… in the following ways.
(B)…有三个主要理由。… for three major reasons.
(C)要…，至少我们可做三件事。To …，there are at least three things we can do.
例︰(A)我用下列方法增加信心。
I increase my confidence in the following ways.
(B)人们学外语有三个理由。
People learn a foreign language for three major reasons.
(C)为了维护健康，我们每天至少可做三件事。
To keep healthy，there are at least three things we can do every day.
23、那就是(说)…;亦即…
That is to say，…
That is，…
Namely，…
例︰我们生活需有规律。也就是说，早睡早起，戒除烟酒。
We need to live a regular life. That is，we can keep good hours and refrain from smoking and drinking in the daily activities.
24、(A)基于这个理由，… For this reason，…
(B)为了这个目的，… For this purpose，…
例︰基于这个理由，我已决定把行医作为未来的职业。
For this reason，I have decided to take practicing medicine as my future career.
25、我们有理由相信…
We have reasons to believe (that)子句
例︰我们有理由相信体罚应该严格禁止。
We have reasons to believe that corporal punishment should be strictly prohibited.
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