转折的短语
Key words commonly used to express comparison (同类比较)include:
like
similar
as
same
in the same way
too
both
most important
have in common
the same as
similarly
as well as
Key words commonly used to express contrast(非相同 事情对比）include:
although
yet
whereas
however
but
while
differ
differ from
differ than
instead
unless
unlike
on the contrary
contrary to
even though
on the other hand
the reverse (of)