1.那就是（说）…；亦即…
Thatistosay,…
=Thatis,…
=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 act ivities.
2.A）基于这个理由?…Forth is reason,…
（B）为了这个目的?…Forth is 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.
3..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