婉謝邀請信函
dear
sirs，
my
wife
and
i
were
very
grateful
to
receive
an
invitation
to
attend
the
celebrations
marking
the
opening
of
your
new
factory．we
are
sorry
to
inform
you
that
we
have
to
decline
your
invitation
owing
to
a
previous
engagement．
yours
faithfully，
中文對照
敬啟者：
我和夫人非常感謝閣下邀請參加貴公司新建工廠開業典禮慶祝儀式。但由于事先有約，無法應邀前來參加，深表遺憾。
×××敬上
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